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Full text of "The California Farmer (1856-1857)"

50Q7 1201013 7 

California Slate Library 



Accession A' 
Call No. 



JA9191 

<2- £-22. Ojs 



Mb 



t 




I 



INDEX 



Page. 

Abbortiakoon Mine 296, 300 

Absolute title fee, simple or 35 

Accidents at Butte 803 

In U. S. Coal Mines 780 

Mine-owners' liability for A. J. Pillsbury. . . . 66 

Acetylene gas explosions 453 

Acre-foot used term 681 

Action of oxidizing agents on the velocity of gold in 

potassium cyanide 500 

Of minerals, sulphates and arsenates on cyanide solu- 
tions Andrew F. Crosse. ... 16 

Adsorption, definition of 714 

Adalbert Mine, in Bohemia 233 

Afterthought Copper Co 95 

Agitating concentrate J. E. Alley.... 118 

Agitation at Oriental Con., Korea 65:; 

At Tonopah 825 

Of slime at Empire mine 580 

Agitator on the Rand, Hendryx Johannesburg corres- 
pondence 599 

Agitators at Waihi, Brown 226 

Step-bearing for slime Douglas Waterma».... 375 

Ditto L. C. Trent 505 

Agnew, J. A 148 

Agricola 423, 426 

Agricola's 'De Re Metallica' Editorial.... 423 

Views on origin of ore deposits 427 

Aguacate Mines •. 129 

Ahmeek Copper Co 771 

Air blasts in mines 516 

Compressors at Anaconda 724 

Compressors at mines generally 723 

Compressors, enclosed type. Chicago Pneumatic Tool 

Co. 550 

Air receivers require cleaning out 389 

Replacing steam for hoisting at Anaconda 349 

Transmission lines, joints in 35 

Compressor plants at Panama canal 160 

Lift at Black Oak Mill 689 

Lift practice 714 

Receivers at Anaconda 725 

Used in converter at Great Falls 328 

Alaska, Aniak district 85 

Bullion optput 741 

Coal Editorial .... 649 

Conditions and a program Walter K. (Mark.... 172 

Conditions in Editorial.... 164 

Copper production 601 

Freight rate reduction 129 

Gold mines 379 

Katalla oilfield Arthur Thompson.... 169 

Mines 89 

New dredges in 94 

Poulation of 415 

Problems U. S. Rush.... 181 

Problems at Mining Congress 718 

Trade in 1912 708 

Alaska Commercial Co 15 

Alaska Consolidated Copper Co 156 

Alaska Gastineau Co 262, 281 

Alaska Geological Survey 718 

Electric plant ■> . . 510 

Alaska Gold Mines 277. 313, 314, 348. 350, 605, 674, 836 

Ditto Editorial 262, 281, 2S2 

An Exchange 537 

Alaska Juneau mine Editorial.... 135 

Alaska Mexican Co 447 

Mine 187 

Output 317, 607. 741 

Alaska mine. Sierra county, California 4S0, 709 

Alaska Perseverance Co 1S3 

Ditto Editorial 163 

Mine 262, 281 

Alaska Railway Commission 383 

Ditto Editorial 327 

Alaska Treadwell Co 447 

Ditto Company reports.... 227 

Mine 263, 281, 285, 575 

Mine, power at 211 

Output 70S, 839 

Welfare of employees 617 

Yield for June 156 

Alaska United Copper Co 69, 100, 510 

Alaska United Gold Mining Co 61 

Mine 187 

Output 317, 607 

Ready Bullion mill of the 35 

Alberger Pump & Condenser Co., Hammond meter 782 

Aldrich pumps at Aspen 302 

Algeria, products of minerals in 1911 569 

Alkalinity of cyanide solutions in treating certain ores 205 
Alleged chemical effects of pressure on mineral meta- 

morphism 473 

Allen, A. H. . .Work on acid production from smelting ores 560 

Alley, J. E Agitating concentrate.... 118 

Alloys, behavior of 780 

Insoluble in acid, certain 814 

Of steel 35 

Altona mine 26 

Alumina as a-drying agent F. M. G. Johnson.... 53 

In slags H. C. Bellinger.... 114 

Aluminum as a substitute for tin 516 

Consumption of in United States 305 

Prices fixed 365 



169999 



Page. 

Alvarado M. & M. Co 129 

Amalgamated Co 506 

Amalgamated Zinc (De Bavay's) Ltd. Company report.. 615 

Amalgamated Copper Co 313, 314, 572 

Dividend 538 

Amalgamated Development Co 61 

Zinc dotation plant 355 

Amalgamating devices 847 

Amalgamation at the Homestake 

Allan J. Clark and W. J. Sharwood. . . . 762 

At Bendigo 200 

At Tonopah, no 847 

Amalgamator, Thibault gold 848 

American tin production 49 

American Association of Commerce & Trade In Berlin. 

Editorial.... 38 

American Construction Co 91 

American Cyanamide Co., extensions to plant at Niagara 753 

American Development Mining & Reduction Co 17 

American Institute of Mining Engineers 106, 119, 129 

Ditto Editorial 1. 73, 102, 262, 360, 487 

Ditto J. W. Malcolmson. . . . 151 

And its affairs 406 

Constitution and by-laws 693 

Increasing the dues of H. V. W T heeler. . . . 109 

Meeting of Los Angeles members 221 

American Mines Syndicate 96 

American Mining Co 129 

American Mining Congress 126 

Ditto Editorial 295 

At Spokane 707 

On mineral land laws 685 

Sessions at Spokane Editorial. . . . 615 

American Potash Co. to build plant 80S 

Amercain Smelting & Refining Co 94, 104, 126. 185 

Ditto Editorial.... 683 

Half-yearly report 374 

In the lead market 537 

Omaha, Bag-house at 43- 

American Tungsten Consolidated Corporation 129 

Properties 178 

American Vanadium Co 91 

American Zinc, Lead & Smelting Co 121 

American Zinc Ore Separation Co. plant at Eureka 222 

Amounts of platinum, determination of small 

F. P. Dewey. ... S7 

Amhlygonite at Peerless mine 35 

Amparo Mining Co 635 

Mine 483 

Output 289 

Amphibole in Italy 11 

Anaconda, furnace work at 593 

Increase of wages at 184 

Mines and smelter 749 

Output 250 

Anaconda Copper Company 313, 314, 319, 349, 353, 443 

Hoisting systems 554 

Pay-roll at 152 

Analysis of salt in Silver Peak marsh 827 

Of Tomboy concentrate 820 

Of water from Nebraska lakes 

Of white metal 757 

Analytical work, bottle for 830 

Work, filtering certain solutions in 847 

Andesite at National. Nev 655 

Angelo Deep mine 266 

Aniak district. Alaska 85 

Leasing system 89 

Anode tanks, short circuiting in A. R. Ledoux. ... 52 

Animikite in Ontario 226 

Anniversary of contemporaries Editorial.... 392 

Anonymous constributions Editorial ... . 7S3 

Another Universe 307 

Anthracite coal costs Editorial.... 517 

Production in Pennsylvania 748 

Antelope mining district of Nevada 170 

Antimonial tailing 69 

Tailing, difficulties of cyaniding 191 

Antimony in cyanide treatment 647 

Mining in New South Wales J. E. Came.... 728 

Ore in United States in 1911, no production 178 

Ore production in United States in 1911 205, 4S9 

Production Editorial.... 489 

Use of 160, 226, 489 

Troubles in Rhodesian treatment 614 

Aparoma Goldfields Co 820 

Apex law decision 685 

App mine cost 522 

Mine sale Editorial.... 750 

Appelbaum, Misha E... Copper review for September.... 504 

Ditto.... Copper review for October ... . 633 

Ditto Copper review for November.... 802 

Arabia, mineral discoveries in 376 

Aramayo Francke mines of Bolivia SOI 

Arc-lighting station, first 711 

Arcade Mining Co. re-organized 842 

Argentina coal in Neuquen territory 53 

Argo Reduction & Ore Purchasing Co Editorial.... 2 

Argonaut mine costs 522 

Arizona compensation law Editorial.... 423 

Copper production B. S. Butler.... 529 

Dry washings of value — gold placers of 

T. Dane Carter. ... 166 

Mining law Editorial 37 

Tax schedule 61 



MINING AND SCIENTIFIC PRESS 



Vol. 105 



P; 

Taxat ion of mines Editorial .... 

Arizona Copper Co., Ltd 

Ditto Company reports.... 

Production 

Arizona Empire mine 

Arizona Southwestern M. Co 

Arkansas Valley plant at l^adville 

Arroba. meaning of term 

Value of the Spanish Robert Kraser. Jr 

Arsenates on cyanide solutions, action of mineral sul- 
phates and Andrew F. Crosse.... 

Arsenic produced in I'nited States in 1911, white 

Use of 160, 

Arthur Iron Mining: Co 

Ashio mines and mills Improvement at 

II. Poster Main .... 

Asbestos properties near Llano, Texas 

Ashanti Cold Mines 

Ashpen, new work at 

Assay charges, tire D. C. Livingston.... 

Office at Helena, receipts 

Assessment of mining properties C. E. Jarvis.... 

Associated Chambers of Commerce of Germany 

Editorial .... 

Associated mill. Manhattan J. C. Kennedy.... 

Associated Northern 

Assoc iation of Commerce anil Trade in Berlin, American. 

Editorial. . . . 

Atchison. Topeka & Santa Fe Railway Co 

Atkins, David. . Foreign trade and Panama canal tolls.... 

Atlas Mining Co 

Atmospheric nitrogen, utilization of 

Atmosphere, weight of 

Atomic weights, report of the International Committee.. 

Auchincruive colliery in England 

Augustin process at Park City. I' tall 

Australian Institute of Mining Engineers at Cobar 

Mint reports 

liailroads ' Editorial.... 

Mining laws A. Montgomery.... 

Austin. L. S Wedge mechanical furnace... 

Automatic control of electric hoist.... F. C. Perkins.... 

Pump starter 



A. Bile 



. I :! 1 , 



:!66, 27 



B 



Bahilonia gold mines of Nicaragua... 

Baftins island, expedition to 

Hag filtration plants 

Hag-house at Mammoth smelter 

At Murray smelter 

Employees 

Financial results 

Life of bags 

Hahia in Brazil, mining in 

Mailey, Sir Abe Interest in Rhodesia.... 

Bain, H. Foster Improvements at Ashio mines 

and mills 

Ditto B'esshi mine and Shlsaka smelter.... 

Bainhridge, Seymour & Co 

Kalaklala Con. Copper Co 

Copper production 

Maid Mutte Mining <Si Milling Co 

Balkan war, effect on markets 

Ball-bearings on line shafting 

Hank Mining & Promotion Co 

Barba on ore deposits 

Marite 

Karnes King Co 284, 314 

Harytes, occurrence of in U. S 

Production of in U. S., 1911 

Use of in Italv 

Use of in U. S 

Baseball supersedes business in New York .. Editorial ... . 

Basin Reduction Works 

Hates, Bennett It... Cost of the Santa Ramona shaft.... 

Battleship Mining Co 

Hay State Gas Co. affairs 

Bayldon. H. C 

Bauer, George 

Bauxite, prospecting for . . . , 

Tests for in the field 

Use of 

Bear Top-Orotin Mining Co 

Becher on ore deposits 

Kechwanalar.d Copper Co.. J -til Company reports..!! 

Bedding system at Calumet & Arizona smelter 

l'.eddow. Reese It. appointed state mining inspector for 

New Mexico 

Beebe mine 

Beer roller mill at Pennsylvania mill i i 

Bellinger. H. C Alumina in slags 

Bel! telephone system insurance for employees ... 

Hilt, a; Kossland. I:. C. south C. A 'Stewart .. . 

Belting on oilfields 

Belts 

BendigO, metallurgy at M. W. von Berriew'itz '. '. '. '. 

Mines 

Recent development at 

Benguet mining district, Philippine Islands , .' , 

♦ ~ A. W. Geiger 

Benguet Con. Co 

Bcnner. Raymond C Recent Advances 

in industrial chemistry 

Ditto Research In the Mining School.... 

Bennie, .1. W ....Working costs at the Shannon mine.... 

Benoni Consolidated Mines 

Benson. Karl joined staff of the General Engineering 

Co., Sail Lake 

Berlin, Ameriean Association of Commerce and Trade in 

„ Editorial 

Bessemer conv.n r, treating sulphides in 

_ John Holloway. . . . 

Process with pig iron 

Bessemerizing Editorial'. . , . 

Besshl mine and Shisaka smelter ...,H Foster Bain.... 

Betsy .lane Mining Co 

Bewick Moreing & Co 92, 

Denial of exit frmn Canada 

Big Tiling copper mine 

Bigelow shearing toggle ' 

Bingham Canyon miners on strike 386. 450. SOS 

Ditto Editorial 

Bishop. Creek mill Ugernon Del Mar.... 

Mine and mill 



583 
:: l v 
67B 
580 
674 
61 
742 
814 
633 

16 
175 
1!I4 

573 

239 
1 1 

son 
301 
4 6S 
so:: 
210 

38 

10N 

57 

38 
59 

378 

387 
19 

453 

692 

4 90 

578 

234 

3 86 

487 

141 

831 

490. 

667 



720 
58 
431 
775 
431 
431 
432 
431 



. i 'baries ii. Urquhart . 



632 

239 
363 
508 
126 
562 
124 
537 

68 1 

95 
430 

69 
,319 
160 
145 
14 5 
i 15 

518 
121 
179 

27 
740 
217 
123 
305 
305 
306 

63 
430 
679 
530 

641 
26 
416 
114 
616 
107 
453 
35 
200 
190 
233 

7S6 
769 

629 
182 
798 
185 

422 



552 
71 
363 
124 
508 
381 
129 
169 
575 
392 
561 
561 



Bismuth bearing ore 

Black Oak mill 

All sliming 

Black sands, examination of 

Treatment 

Black Bear quartz mine 

Black Eagle antimony mine of Alaska 

Black Range mine production 

Blast-furnaces at Mason Valley smelter 

Furnaces, accumulations 

Blasting by electricity 

At Panama 

Blowers at Swansea smelting plant 

Blue line prints 

Print frame 

Bluestone mine 

Blyth. Charles R. H„ death of 

Boilers, oil and water in 

Scale 

Boise Basin. Idaho, gold -dredging in I. II. Miles.... 

Boleo Copper Co., output for 1911-12 

Bolivia in 1911. tin in 

Bolivian goldrields Editorial.... 

Bonanza belt east of the Sierras H. C. Cutler. . . . 

Copper mine of Alaska 

Bonanza Gold Mining Co j.. 

Mine 

Mine in Alaska 

Borax output of California, 1912 

Holder Mines Co 

Boron researches on 

Boston copper market 

Boston & Idaho Gold Dredging Co 

Bottle, self-filling measuring O. C. Smith.... 

Bowie, C. P. . .History of the Granite Mountain mines.... 
Braden Copper Co 24, 31 4. 408. 771. 

Ditto Editorial.... 

Results of 636, 

Bradley process 

Process at Anaconda a failure 

Brakpan Mines. Ltd Company reports.... 

Brandos, .hum Felix Mexican conditions.... 

Brazil Editorial 183, 

Iron ore 

Metallic minerals of 

Brazilian mining laws 

Brazilian Golden Hill mine 

Brewer. W. M Mineral resources of the 

Kenai Peninsula 

Brilliant Extended mine 

Hriiiuotting fuel in the Middle West states 

Fuel in Germany 

Briseis Tin Co. output 

British language Kalgoorlie Correspondent.... 

British South Africa Co. reorganization 

British Columbia in 1911 

South Belt at Rossland C. A. Stewart.... 

British Columbia Copper Co 24. 28, 281, 572. 578. 

British Broken Hill 

British Guiana, gold and diamonds in 

Mining Editorial.... 

Broken Mill Proprietary Co 316. 355. 

Output 218, 

Prosperous condition of 

Report 

To start making iron Editorial ... . 

Work, effort at . : 

Broken Hill South Blocks 

Broken Hill South Silver M. Co. report 

Bronokart. F Wolframite In Portugal.... 

Bronze, manufacture of 

Brooks. A. H Work on U. S. Geol. Survey.... 

Broomassie mine 

Brown. K. Oilman, in Cornwall 

Brown. W. L Steel sets in inclined shafts.... 

Buck's Reef Gold Mines 

Bucket elevator at Black Oak mill 

Bnckhorn mill 

Bullion from Tonopah mines, fineness of 

in parting, impurities in 

Relining by nitric acid 

Refining by sulphuric acid 

Burner, a convenient telescoping. ... Fritz Friedrichs. . . . 
Bunker Hill & Sullivan M. & C. Co 26, 63. 

Ditto Editorial . . . .39. 

Dividends 4 4. 537. 609. 

Lawsuit 

Mine 

Skip accident 

Bunker Hill mine. California 

Bunsen valve, modified Leslie Russell Milford ... 

Burch, H. Ken von 

Ditto Work at Miami.... 

Burchard. E. F Electric smelting of iron ore.... 

Bureau of Foreign and Domestic Commerce. Editorial. . . . 

Bureau of Manufacture 

Bureau of Mines and Western Mining...!. A. Holmes.... 
Bureau of Mines, United States 

Expenditure " 

Repoit on magazines for explosives 

Burma, mining in 

Burma Gold Dredging Co 

Burma Mines. Ltd 348. 

Ditto Company reports.... 

Burma Ruby Mines 

Busliwick mine of Rhodesia 

Butler. !!. S Copper production of Arizona.... 

Ditto Copper production of California.... 

Butler. B. S.. and J. P. Dunlop Lead and zinc pro- 
duction by regions 

Butte as a copper producer 

Geology 

Minis' output 

Mines, worked for gold silver, Riid copper in order... 
Butte & London Company 152. 

Mine 

Butte & Superior Copper Co. 22. 26. 63. 90. 96. 152, 281, 444. 

Litigation 

Butte & Superior Mining Co 121. 124. 

Butte a- Zenith Co formed al Duluth 

Butte Central Copper Co 26. 

Butte Electric & Power Co 

Butte Virginia Company 

Butters. Charles.: Work on filters.... 

Butters Filter Co. loses suit Editorial.... 

Bv-nroducts from coke production 

From former waste Editorial.... 



age. 
I 12 
687 
687 
621 
625 
136 

4 89 

5 40 
269 
142 
681 
sis 
799 

100 

714 

91 

:. i 

258 
486 
33(1 
643 

53 
360 
833 
573 
125 

58 
70H 
800 

9 1 
629 



33" 
83" 
166 
80 1 

134 

6 43 
90 
6(16 

32 
767 

4 23 

8 

528 
3 24 
20 

662 
642 
19 1 
191 
6 1 2 
89 
837 
369 
KPT 
642 
3 I 5 
14 1 
58 3 
56" 
642 
605 
54 7 
199 
131 
153 
518 
758 
830 

5 1 9 
300 
538 
29 6 

:.v 

687 
71" 
847 
751 
751 
755 
667 
I 19 
391 
775 
5 13 



516 
46" 

699 

163 

571 
309 
359 
19 
765 
134 
834 
- I I 
827 
827 
827 
779 
310 
503 
529 
562 



312 
195 
233 
487 
265 
154 
sii:: 
4 45 
6<1 
216 
577 
154 
650 
127 
650 
583 
152 
816 



Vol. 105 



MINING AND SCIENTIFIC PRESS 



5 



Page. 

Caetani. Gelasio. work at Tomboy mill -■ 820 

Calaveras Copper Co So, l-j> 

Shipment of ore j>^2 

To build electric railroad °"i 

Calcium cyanamide transport 291 

California clay, production of »'» 

And Mexican petroleum 598 

Copper production of H. S. Butler.... 562 

Exploration in Lower 14 

Massive, finely granular rhodinite in 54 

Mineral industry of, 1912 880 

Mines and minerals Editorial.... 684 

Miners' opportunities at Panama-Pacific Exposition, 

Harold French.... 735 

Mines, conditions governing cost of 520 

Mines, operating costs of Charles Jamil.'... 520 

Oilfields, production and allied statistics 

J. H. G. Wolf 402 

Petroleum exports 109 

California & Oregon Railroad Co 24 1 

California Miners' Association Editorial ... .37, 423, 750 

Meeting 764 

Views on state control of lands 785 

California Petroleum Co. operations 598 

California, Shasta & Eastern Railway Co 95 

California State Mining Bureau 817 

Ditto W. H. Storms.... 821 

Personnel of staff 823 

Purpose of 822 

Calkins. F. C 143, 344 

Ditto Concrete shaft lining.... 568 

Ditto Mines of the Miami district.... 237 

Callbreath. J. F 183 

Calumet & Arizona mine 156, 313 

Output 529, 639, 773 

Calumet & Hecla mill Subscriber.... 20 

Mine 154, 233, 282, 353 

Output 640 

Calumet Copper Creek M. Co 61 

Caminetti bill Editorial.... 72 

Cam shafts breakages 453 

Shafts breakages at Citv Deep 291 

Cam & Motor mine 381, 445, 729 

Camp bread making . 342 

Camp Bird-Annual report 704 

Ditto Editorial. . . . 293 

Mine 319, 675 

Cams, breakage of 258 

Canada and the nickel supply 669 

Appointment of a minister of mines .... Edi torial ... . 229 

Silver mining at Cobalt, Ontario 

Regin;i Id 13. Hore .... 74 

Sudbury nickel district. Ontario .... K i rby Thomas.... 433 

Canadian Mining & Exploration Co 121 

Ditto Editorial .... 101 

Canadian Mining Institute 29 

Victoria meeting Editorial.... 37 

Canal tolls Editorial.... 133 

Cananea and the war Editorial.... 327 

Furnace work at 593 

Cananea Consolidated Copper Co. developments 677 

Mill, screen analysis at 339 

Work of the L. D. Ricketts 565 

Candy Trust Editorial.... 815 

Caniagas dividend 537, 545 

Capital mountain mine 840 

Captain orebody 125 

Carat, weight of 748 

Carbon in cyanide solutions, effect of 730 

Precipitation of gold and silver by 

R. K. Cowles. ... 730 

Carborundum as an abrasive 780 

Carga, meaning of term 814 

Cam Brea & fineroft report 3S0 

Came, J. E Antimony mining in New South Wales. . . . 728 

Carter. J. B.. death of 99 

Carter, T. Lane Editorial. ... 327 

Death of .'. 356 

Gold Placers of Arizona.. Dry Washings Of Value.... 166 

Cassiterite in Rhodesia 405 

Caste in human character Editorial..., 816 

Castle Valley Coal Co 22, 59 

Castle Creek Hydraulic G. M. Co 88 

Cauldwell, Frederic W Manganese deposits of the 

Caucasus. . . . 113 

Caucasus, manganese deposits of 

Frederic W. Caldwell.... 113 

Caucasus Copper Co., Ltd 604 

Ditto Company report.... 779 

Caustic soda in cyanide treatment 814 

Cement for leather belts 714 

Makers Editorial.... 37 

Output of California 1912 800 

Plant of Chee Hsin Co 760 

Centennial-Eureka Co 538 

Mine 776 

Central Eureka, costs at mine 522 

Central Pacific and Southern Pacific Companies 247 

Central Red, White & Blue Co Annual report.... 642 

Cerro de Pasco production 643. 757. 761, 820 

Cerro, New Mexico Editorial.... 261 

Cevlon. graphite from 35 

Chaffers-Main Reef 847 

Chain driving machinery 847 

Simplex rivetless Cross Engineering Co 132 

Chalmers. J- A., death of 420 

Champion Reef mine 572 

Charging holes at Panama 81.8 

Charleston Hill loses suit with National mines 552 

Charleston Hill National Mining Syndicate 54 

Charters Towers district gold output 563. 777 

Goldfield 218, 224 

Mining 643 

Chee Hsin Cement Co. new plant 760 

Ohewelah district of Washington 837 

Chihuahua, affairs in state of 843 

Chilean mill practice 814 

Chemical properties of metals 495 

Chemicals, current prices of 162 

Chemical, Metallurgical & Mining Society of South Africa 335 

Chemistry of acid solutions ow cyanide 660 

Recent advances in industrial. Raymond C. Benner. . . . 629 

Cheming Copper Co 282 

Chicago Editorial.... 230 

Chief Consolidated mine 189 

Chihuahua, Mexico, Veta Colorado M. & S. Co 4 

Situation in the state of 174 



Page. 

Chiksan Mining Co 84 

Chile copper exports 549 

Iron mining in 462 

Nitrate exports from 54 

Chilean coal mines 421 

China, coal mines of North 117 

Mineral production of 760 

Printing in 456, 457 

China's iron ores Editorial.... 3 

Loan 1 

New loan 392 

Nickel deposits 100 

Chinese affairs Editorial.... 616 

Interests in Fukien, China 166 

Republic Editorial.... 32 • 

Telegraph rates Editorial.... 3o'.i 

Chinese Engineering & Mining Co., Ltd 117, 760 

Chin Copper Co 185 

Mine 155, 158 

Chispa's mine 775 

Choking of ore-chutes 662 

Chontales mining district, Nicaragua ... Arthur Feust.... 720 

Chosen Mining Co 84, 440 

Chromite production of the world 226 

Christmas Editorial.... 784 

Chromium 35 

Alloys 629 

Demand for 401 

Ore, prospecting for W. C. Phalen 400 

Uses of 401 

Chromax, bronze 35 

Churn drilling in shaft sinking ... .Tom McCormac . . ... . 45 

Cienega Gold Mines Co 29 

Cinco Minas Co 443 

Civil Service and pensions Editorial.... 202 

Civil Service Commission vacancies 504 

Claims, work existing upon 69 

Clancy process at Colburn mill. Cripple Creek o43 

Clarifying cyanide solutions 11 

Clark, Allan J. and W. J. Sharwood 

Amalgamation at Homestake . . . . ib2 

Clark, H. H Device for mine air humidifying.... 569 

Clark, W. A. Apex rights suits with Butte & Superior Co. 219 

Clark, W. E Alaska, a condition and a program. ... 172 

Classifying diaphragm cone 291 

Clay production of California »16 

Cleveland meeting of the Institute 568 

Clifford, James O Industrial lead poisoning.... 9 

Climatic effect at Panama 726 

Closed-circuit system of classifying and grinding 829 

Coal analysis 430 

Bituminous, output in United States 486 

Conditions in the East Editorial 455 

Consumption in smelting copper ore 594, 596 

Consumption of Pittsburgh 582 

Distillation, cyanogen compounds from 272 

Dry cleaning of 325 

Dust in smelting 594 

Energy in utilized 486 

Errors for the determination of moisture in 626 

Exports from New South Wales 

W. F. Hildehrand and W. L. Badger.... 626 

In Korea 626 

In Newquen territory, Argentina 53 

Interstate Commerce Commission decision re freight 

rates in Utah jjjj 

Lands of Wyoming Editorial ... .456, 4ia. iX.. 

Lands, sale of 271 

Mines of North China 11' 

Mining in U. S. by machines 728 

Output of New South Wales 46,> 

Production in U. S. in 1911 196 

Production of China "60 

Production of Pennsylvania 4St_, 

Production of Rocky Mountains _ j 

Production ot the world in 1911 TIN 

Supply of Manchuria Edward di Villa.... «3 

Coalfields in U. S., area of <80 

Of Oyon, Peru 643 

Of the Wind River region 473 

Coalmine of Victorian government 6 12 

Cobalt, activity at 219 

District 153 

In U. S 659 

Mining 

Silver mining at Reginald E. Hore.... il 

Cobalt Majectic Co 98 

Cobar Copper Mine 234 

Coeur l'Alene district 143 

Region, geology of 344 

Coghill. W. H Copper and sulphur in cyanide solu- 
tion 203 

Coke 14 

Production in U. S 453 

Cole-Ryan Syndicate, split of 80.> 

Colloid s Editorial 2 

Colleges and research Editorial ... . 2 

Collins, George E Gilpin county ores and their 

recovery 150 

Ditto Persistence of ore In depth.... 409 

Ditto Water as an indication of ore.... 441 

Collodion on tracing cloth 681 

Colombia, customs duty 471 

Dredging in *71 

Mining conditions in Antioquia. . .Louis A. Maire.... 536 

Colorado mine dididends 811 

Mine production in 1911 180 

River, drainage and flow of • 598 

School of mines equipment 416 

Sulphur in 174 

Zinc works destroyed 448 

Colorado Fuel & Iron Co 511, 775 

Ditto Editorial.... 2 

Dividends 44 

Colorado M. Co. dividends 44 

Report 744 

Colorado Mining Co. of Philippine Islands 563 

Mine and mill. Philippine Islands 

Paul R. Fanning. . . . :>63 

Mine at Arorov. Philippine Islands 355 

Testing plant Editorial.... 750 

Colorado's prospects Editorial.... 164 

Colombia, details of 312 

Combustion of coal 486 

Commissioners Court of Culberson county 58 

Committee of Five 119. 135 

Ditto Editorial.... 103 

Report of 106 

Commonwealth mine and mill 70S 



6 



MINING AND SCIENTIFIC PRESS 



Vol. 105 



Page. 

Compania de Real del Monte y PachUCa 42 

Company reports- 

Alaska Treadwcll Co 22« 

Brakpan Mines. Ltd H 

Goldfield Consolidated Mines Co 19, 1S3, -ill. 731 

Nevada-Douglas ggj 

Nipissing Mines Co 22i 

Silver King Coalition Mines Co 32 

Utah Copper Co 259 

Comparative method of screen analysis.. A. T. Tye 339 
Compressed air hoisting at Butte. . . .Thomas T. Read. . . . 554 

Comstock, impression of the Thomas T. Read.... 244 

Lode at depth 201 

Mines 233 

Mines gold yield of 1911 214 

Mines production 244 

Mines' report . ... 189 

Mines, work at 776, 810 

Pumping association meeting 255 

Concentrate agitating J. E. Alley 118 

Cyanidation of Noel Cunningham.... 634 

Ditto Rohert Linton.... 437 

Feeding into furnace 325 

Outout of Ouray 808 

Plant at Maibong, Korea 652 

Plant at Tabowle. Korea 652 

Treatment at Bendigo 200 

Concentrating table, motion described 647 

Table, work of 421 

Concentration at Cananea 566 

At McGill plant 288 

At the Tomboy mill 820 

At Tonopah 828 

Of placer gold, dry F. J. H. Merrill 50 

Concentrator, a new dry. International Concentrator Co. 550 

At Miami 600 

Carcheno Mining Co 501 

Mine and Mexican rebels 545 

Concrete affected by sewage gas 814 

Mill foundations in Honduras 752 

Proportions of constituents 568 

Shaft lining F. E. Calkins 568 , 

Stringers at Ahmeek mine 421 

Congress meets Editorial.... 717 

Congress of Applied Chemistry Editorial.... 391 

Conkling Mining Co 128 

Connelly. W. A. Prospecting In Nicaragua.... 373 

Conservation Editorial.... 750 

Consolidated Fuel Co 59 

Consolidated Goldfields of New Zealand. Ltd 116, 604 

Consolidated Gold Fields of South Africa Co 632 

Consolidated Investment Co 121 

Consolidated Mercur, G. M. Co 59 

Mine, position of 642 

Report 713 

Consolidated Mining & Smelting Co. of Canada. Ltd. 

Company report 645 

Consolidated Utah Fuel Co 22 

Constitution and Bv-Laws. American I. M. E 693. 699 

Of the Institute Editorial.... 684 

Construction of t riangulation station . . . . E. R. Rice.... 681 

Convenient telescoping burner Fritz Frledrlchs . . . . 667 

Converter at Copper Queen smelter 541 

Capacity at Great Falls plant 328 

Great Falls type, at Boston & Montana smelter 222 

Practice, development in Editorial.... 552 

Convertors for copper matte Editorial.... 71 

Conveyor-belt costs, reducing 628 

Feeding 628 

Effect of weather on 628 

Use of 549 

Cope's Creek Tin Sluicing Co. output 802 

Copeland. Isaac, death of 712 

Copper alloys 714 

And bronze, tempering 830 

Analysis 800 

And sulphur in cyanide solution .... W. H. Coghill.... 203 

Cathodes, weight of 439 

Consumption, avenues of Editorial.... 616 

Content of California ores Editorial.... 551 

Deposits of Hidden Creek. B. C...R. G. McConnell 621 

Discussion 706 

District, new in the Caucasus 

St. Petersburg correspondence. . . . 654 
Electrolytic determination of....C. E. Travillion . . . . 830 

Electrolytic, Extraction in Norway 

_ Charles Adams Holder.... 686 

Exports from Chile 549 714 

Exports in 1912 Editorial 360 

Extraction, wet methods of 360 

Financial control of Editorial.... 650 

Fire assay for 489 

From bullion refined bv acid 756 

Hydrometallurgy of...' Edward D. Peters.... 602 

In steel rails 248, 347 

Industry, growth of the 845 

Losses in certain mills in U. S 360 

Manufactures at Birmingham. England 438 

-Manufactures at Liverpool. England 438 

Manufactures in France 439 

Market. Boston 22 

Market. New York 24 90 120 836 

Markets of the world Daily Consular Report 438 

Matte, converters for Editorial.... 71 

Mines in Spain 291 

On Orkney islands 597 

Ores in bronze manufacture 830 

Output from Butte mines 6S6 776 

Output of California. 1912 800 

Output of Mt. Lyell ' 798 

On steel, effects of Kirhv Thomas 474 

Output, 1912 88 

Output of Sulitjelma mine 729 

Plates at Homestako. preparation of 762 

Production in Nevada in 1911 247 

Production in Utah in 1911 207 

Production of Alaska 572, 601 

Production of Arizona B. S. Butler.... 529 

Production of California B. S. Butler...! 562 

Production of individual states 556 

Prodction of Russian Empire 439 

Prices and surplus Editorial.... 72 

Record-breaking output of 556 

Refining at the Nikko Copper Works, electrolytic 

Tetsutara Hasegawa. . . . 465 

Report lames Lewis & Sons. ... 98 

Review for September Misha E. Appelbaum . . . . 504 

Review for October Misha E. Appelbaum 633 

Review for November Misha E. Appelbaum.... 802 



Page. 

Rolling mill practice 714 

Smelter Mason Valley Thomas T. Read.... 267 

Surplus 161 

Trade, activity in 350 

Uses of in Europe 248 

Copper Extraction Co 90 

Copper Producers' Association Report, 45, 192, 343, 473. 

506, 633, 768, S04 

Ditto Editorial 73, 456 

Copper Queen Co 62. 674 

Mine models 338 

Output 529. 639, 773 

Copper Queen smelter 2". 

Copper River Basin of Alaska 526 

Coppermines Co 97 

To reorganize 120 

Corem M. & R. Co 62 

Corning. C. R 496 

Cornwall, methods of mining 134 

Mining In 508, 672 

Pneumatic stamps used at 148 

Coronation mines development 578 

Of British Columbia 419 

Corrosion of track fastenings 780 

Cost of copper production in Michigan 769 

Of chemicals at Goldfield 831 

Of cyanlding at Ophir plant 203 

Of forwarding sectlonalized machinery 748 

Of heating solutions 828 

Of living in Natal Editorial.... 359 

Of mining at Panama 820 

Of power on Rand 823 

Of precipitating and refining at Goldfield 831 

Of Santa Romona shaft B. R. Bates.... 179 

Of spares for mills at Goldfield, Nev 831 

Of stamping at Goldfield 831 

Of State Mining Bureau 823 

Of tube-milling at Goldfield 831 

Costs at Mammoth mill. Idaho 74:'. 

At the Shannon mine, working .... J. W Bennie.... 798 

At Tomboy mill ' 820 

Of California mines, conditions governing 520 

Of California mines, operation ... .Charles Janln.... 520 

Of mining Editorial. ... 517 

Of treatment at Empire mine 589 

Of treatment at Mercur mine 714 

Of treatment at Oriental Con. mills, Korea 653 

On the Mother Lode mines 403 

Cowles, R. K„ Precipitation of gold and silver bv carbon 730 

Cripple Creek Editorial . .. . 293 

District Mills report 63 

District output 181 

Drainage Editorial.... 517 

History Horace F. Hunt 570. 634 

Mining at William H. Storms.... 14 

Output 188, 318. 775 

Production In 191! 1 80 

Production 6119 

Croesus Mining Co 62 

Cross Engineering Co Simplex rivetless chain.... 132 

Crosse, Andrew F Action of mineral sulphates and 

arsenates on cyanide solutions 16 

Crown Chartered Co. of Porcupine Editorial. . . . 359 

Crown Mines Co 21. 263 

Production 539. 604 

Crown Point mine 577 

Crown Reserve mine 9x. 153 

Crushing, the laws of 760 

Culberson County Commissioners' Court 5S. 

Culebra cut. geology of I). F. MacDonald . . . . 726 

Cumpston. J. H. L 308 

Cunningham claims Editorial.... 391 

Cunningham. Noel Cyanidation of concrete. .. . 834 

Curtis machine made in Denver 50 

Curtz Con. M. Co 26 

Curves of comfort 308 

Cutler. H. C Bonanza belt east of the Sierras.... 83.3 

Cuyuna iron range Kirby Thomas.... 52 

Cyanimide produced from heating calcium carbide in ni- 
trogen 

Cyanidation of concentrate Noel Cunningham.... 

Ditto Robert Linton 

Of pyrltic ore F. B. Reece.... 

Plant, Veta Colorado mill and — I. II 

Bernard Mac I >onald . . . . I , 

Cyanide bullion after acid treatment 

Consumption at Empire mine 

Consumption at Rosario mill 753 

Consumption in treating BUlphlde ores 203 

Freight or, to Goldfield ."77 

Plant at Brady mill. Nev Sio 

Plant at Taracol. Korea 653 

Plant at the Empire mines. Grass Valley 

Frank A. Vestal .... 5S6 

Practice in Mexico 781 

Precipitates of silver exports 582 

Process, Gitsbam 660 

Rash treatment of 61 t 

Silver sulphide ores 597 

Solution, reactions of iron with 463 

Solution, regeneration of W. D. Williamson. ... 49 

Solutions, action of mineral sulphates and arsenates 

on Andrew F. Crosse IS 

Solutions, clarifying 11 

Solutions, selective action of 25S 

Solutions for quantitative separation of base metals 

in determination 

P. L. Guppy and Douglas Waterman.... 597 

Work in ranching districts of Mexico 727 

Cyanogen compounds from distillation of coal 272 



629 
634 
137 



I '1 



D. & W. Mining Co 25, 95 

Dakota metal production 88 

Dallas. Texas. Steele. Sutton & Steele of 50 

Daly-Judge mine 190 

Quarterly report 642 

Daly West Mining Co 32 

Dividends 44 

Danaite 100 

Darien Gold Mining Co 11 

Davis. Mark K Market support. . . . 832 

Davls-Dalv Copper Co 26, 152 

Day Bristol Con. M. Co. output 676 

Deadwood Mines Co 27. 128 

De Beers Diamond Co. output 614 



Vol. 105 



Page. 

Decanting of slime Editorial.... 751 

Decrease of value in ore-shoots with depth, 11 

F. Lynwood Garrison. . . . 700 

Deep workings on Rand 671 

De Gomez. Victor, death of 257 

Deister slime table at the Coniagas 15« 

DeKalh. Courtenay Pacific Smelting Co 602 

Ditto Panama canal tolls.... £14 ' 

De Lamar Co., Ltd., report 547 

Del Mar, Algernon Bishop Creek mill.... 561 

Demarest, David D., death of 712 

Dennis, P. J Modern method of gravel excavation.... 136 

Denver, Curtis machine made in 50 

New Rand near Editorial.... 1 

Deposits of the Caucasus, manganese 

Frederic W. Cauldwell . . . . 113 

Of the Inyo mountains, marble . . . .Robert T. Hill. ... 86 

Depreciation in mining 801 

Depth, persistence of ore in T. A. Rickard.... 264 

Determining pitch of gears Douglas Waterman.... 340 

Determination of small amounts of platinum 

F. P. Dewey 87 

Detonators, deterioration of 681 

Detroit copoer production 530 

Detroit Copper Co 156, 506, 575 

Development at Great Fingall mine 806 

Of converter practice Editorial. . . . 552 

Of the reverberatory copper smelting furnace 

E. P. Mathewson . . . . 592 

Work at the Shannon mine 798 

Dewey, F. P Determination of small amounts of pla- 
tinum 87 

Diamond-bearing lands in Bahia, Brazil 272 

Factories at Amsterdam 421 

Output of DeBeers Co 614 

Production of South Africa 446 

Diamondfields of Pretoria 503 

Of the world 432 

Diamonds and gold in British Guiana 144 

In Brazil Editorial.... 684 

Diesel engine development 584 

'Diggins' at Spokane Mining Congress 718 

Disposal of tailing at El Tigre, Sonora 

Donald F. Irvin. ... 727 

Distribution of gold in British Guiana 144 

Dividends 17 

From British Columbia mine 578 

On the Rand 251 

Doctor-Jack Pot Mines Co 63, 675 

I'odge Manufacturing Co. employees' annual outing. . . . 390 

Doe Run and St. Joseph Lead Co Editorial. . . . 584 

Doe Run Lead Co. management of 836 

Mills 609 

Dolcoath mine report 379 

Dolores Mines Co 129 

Dome Mines Co 313 

Mine output 152, 218, 309. 380 

Dominion Reduction Co 88 

Dominion Safety Explosives Co 59 

Dominion Steel Corporation 23 

Dorr, J. V. N Work on filters.... 650 

Dos Estrellas Co., dividends 635 

Douglas county fossil placers Editorial. ... 1 

Douglas, James, on converter development 552 

Douglas, Walter, captured in Mexico 360 

Dow affairs in Boston 739 

Dow. S. R. & Co. failure 478 

Ditto Editorial 424 

Dowling. W. R 335 

Drainage of pipe in cold climates 847 

Drake, Francis Transvaal mine supplies. . . . 176 

Dredge details of Yuba dredge near Idaho City S32 

For Marysville Gold Dredging Co " 639 

No. 7 of Natomas Co 709 

Performance with 15-cu. ft. buckets near Idaho City 330 
Performance with 5-cu ft. buckets near Placerville, 

Idaho 330 

Sinking of 741 

Dredged land reclamation Editorial.... 518 

Land reclaiming J. H. Leggett.... 527 

Dredges operating on the Seward Peninsula 396 

In Alaska, new 94 

Dredging alluvial tin in Cornwall 878 

By-products Editorial.... 5S4 

In Colombia 471 

In Philippines ! 769 

Near Lewiston, California 352 

On the Seward Peninsula Charles Janin.... 394 

Drill contests at Butte 389 

Light prospecting R. Y. Hanlon.... 17 

Results on Modderfontein Deep 382 

Drilling at Fanama 819 

At the Mother Lode mines 403 

Contest records Horace F. Hunt.... 150 

Contests Editorial.... 39 

Contests at Wnrdner, Idaho 742 

For oil in California 824 

For potash 502 

Driving and widening levels at Waihi mine 789 

Droege Mining Co 26 

Drucker, A. E Milling plants at the Oriental 

Consolidated, ITnsan, Korea 652 

Dry concentration of placer gold....F. J. H. Merrill.... 50 

Dry agent, alumina as a F. M. G. Johnson. ... 53 

Dues of the A. I. M. E., increasing the 

H. V. Wheeler. ... 407 

Dumps, tailing and 35 

Dunlop, J P. and B. S. Butler .... Lead and zinc produc- 
tion by regions 342 

Dunshee. B. H Work at Butte 556 

Dynamite made in South Africa 614 



E 



Eagle & Blue Bird 776 

Eagle Mining & Milling Co 126 

East Butte Copper Co 606, 673 

Purchasing mines 803 

East Rand Proprietary Co 78, 112 263, 266, 671 

Output 604 

East Tintic case Editorial. . . .294, 455 

East Tintic Consolidated mine 303 

Eastern metal market review 732 

Easton, H. L Estimation of sodium peroxide.... 87 

Ecuador Editorial.... 102 

Sketch of the geology of W. A. Wolf.... 110 



I 

Page. 



Eder, P. J Mining conditions in Aritioquia, 

Colombia 733 

Edison giant crushing rolls J. F. Springer. . . . 276 

Editorial: 

Agricola's 'De Re Metallica' 

Alaska coal 649 

Alaska Gold Mines Company 262 

Alaska Juneau mine 135 

Alaska Perseverance mine 163 

Alaska Railroad Commission 327 

Alaskan conditions 164 

American Association of Commerce and Trade in Ber- 
lin 38 

American Institute of Mining Engineers 

1, 73, 102, 135, 262, 360 

Constitution 487 

American Mining Congress 295 

At Spokane 615 

American Smelting & Refining Co 683 

Anniversary of contemporaries 392 

Anonymous contributions 783 

Antimony production 489 

Anthracite coal costs 517 

App mine sale 750 

Argo Reduction & Ore Purchasing Co 2 

Arizona mining law 37 

Taxation of mines 583 

Arziona's workmen's compensation law 423 

Australian railroads ...... 487 

Besseiperizing 71 

Baseball supercedes business in New York 518 

Bolivian goldfields 360 

Braden Copper Company 134 

Brazil 133. 423 

British Guiana mining 593 

Broken Hill Proprietary to start making iron 199 

Bunker Hill & Sullivan Mining & Concentrating Com- 
pany 39, 391 

Bureau of Foreign and Domestic Commerce 359 

Butters Kilter Company loses suit 583 

By-products from former waste 816 

California miners and minerals 684 

California Miner's Association 37, 72, 423, 750 

Caminetti bill 72 

Camp Bird mine 293 

Canada appointment of Minister of Mines 229 

Canadian Mining & Exploration Company 101 

Canadian Mining Institute, Victoria meeting 37 

Canal tolls 133 

Cananea and the war 327 

Candy trust 815 

Carter, T. Lane, death of 327 

Caste in human character 816 

Cement-makers 37 

Cerro. New Mexico 261 

Chicago 230 

China's iron ores 3 

Loan 1 

New Loan 392 

Chinese affairs 616 

Republic 327 

Telegraph rates 3f.!l 

Christmas T84 

Civil Service and pensions 262 

Coal conditions in the East 455 

Lands of Wyoming 456, 783 

Colleges and research 2 

Colloids 2 

Colorado's prospects 164 

Testing plant 750 

Colorado Fuel & Iron Co 2 

Committee of Five 103 

Congress of Applied Chemistry 392 

Congress meets 717 

Conservation 750 

Constitution of the Institute 684 

Converters for copper matte 71 

Copper consumption, avenues of 616 

Content of California ores 551 

Exports from United States in 1912 380 

Matte, converters for 71 

Prices and surplus 72 

Copper Producers' Association 73 

Report 456 

Cost of living in Natal 359 

Costs of mining 517 

Cripple Creek 293 

Drainage 517 

Crown Chartered Company of Porcupine 359 

Cunningham claims ■ 391 

Decanting of slime 751 

Development of converter practice 552 

Diamonds, in Brazil 684 

Doe Run and St. Joseph Lead Companies 584 

Douglas county fossil placers 1 

Dow & Company, S. R., failure of 424, 4 1 ? 

Dredged land reclamation 518 

Dredging by-products 584 

Drilling coatests 39 

East Tintic case 294, 455 

Ecuador 102 

Eighth International Congress of Applied Chemistry. 1 

Emperor of Japan, death of 133 

Engineers' Club 37 

Europe and the Balkan war 585 

Excursions of the Institute 102 

Exposition, 1915, mining exhibit 717 

Faulty use of certain terms 816 

Financial conditions of United States 518 

Control of copper 650 

Financing the Institute 73 

Finding mines 230 

Fire in mines 163 

Foreign trade and canal tolls 19S 

Freeport Sulphur Company 328 

Freiburg graduates 517 

Fruits of violence 488 

Gas supply at Joplin district 551 

Geological survey of California 817 

Germany Associated Chamber of Commerce 38 

Geological Survey building 784 

Geographic basis of industry 3 

Gold and silver production 816 

Coinage in Colombia 359 

Imports 392 

Output of Montana 783 

Great Falls converter 328 

Guadalajara 293 

Hawthorne mining companies 64n 

Hayden, Stone & Company interests in Alaska 163 



MINING AND SCIENTIFIC PRESS 



s 



Editorial — Continued : Page. 

High Grade district 230 

Fiomestake Mining Company's affairs 815 

Ideals of imperfection 489 

Illinois Geological Survey 294 

Petroleum fields 1 

Indian pig iron 391 

Institute and Its members 392 

Meeting 456 

International Association for Testing Materials meet- 
ing 328 

International Congress of Applied Chemistry 32S 

International Geological Congress 38 

International Smelting & Refining Company 360 

Iron and steel in Australia 199 

Ore shipments on Great Lakes 518 

Ores of China 3 

Japan's production of gold and silver 551 

Kamloops, B. C, centenary 488 

Katanga affairs 392 

Kelp deposits 455 

Kelvin memorial 229 

Labor in New Zealand 198 

Lake Superior Mining Institute 293 

Land fund of the Institute 165 

Laws 134 

Lead market 360 

Mining in Missouri 39 

Liqupr, prohibiting use of by railroad employees.... 230 

Loans for China and New York state 615 

Local sections of the Institute 719 

Loretta mine 101 

Lure of mystery 393 

Management of the Institute 135 

Measure of precision 734 

Metal markets 717 

Metallurgy at • Homestake 749 

Mexican commerce in 1911 391 

Conditions 488 

Custom duties 815 

Troubles 360 

Mexican Institute of Mining and Metallurgy 102 

Mexico 294* 

Mine inspectors at Joplln 815 

Rescue crews 197 

Rescue conference at Pittsburg 487 

Mine Owners' Association for Utah 487 

Mining by boat 229 

Comparisons 134 

Laws in Alaska 294 

Mining Congress at Spokane 718 

Mining & Metallurgical Society 134 

Minerals Separation Limited of London 134 

Montana wants an experiment station 229 

Moore-Butters decision 649 

Moore Filter Company wins suit 583 

Mt. Lyell fire 784 

National Mines suit decision 552 

Nation's Business, new paper at Washington 359 

Natural gas 3 

Nevada 163 

State affairs 815 

Nevada State Journal souvenir edition 163 

New Rand near Denver 1 

Newhouse tunnel at Idaho Springs 2 

Nicaragua 294 

Affairs 717 

Conditions 391 

Trouble in 230 

Nome steamers 327 

Oil-firing for furnaces 784 

Lands in Utah 197 

Oilfields of Katalla. Alaska 359 

Olympic games and general feeling over results 518 

Ore persistence at depth 261 

Production in Wyoming 816 

Reserves exhaustion not depreciating value of 

mines 683 

Oxford and Ceroid claims case 683 

Panama canal 293 

Tolls 817 

Work 583 

Panama-Pacific Exposition 72 

Patent laws 583 

Monopoly 83 

Patents and litigation 617 

Petroleum production in California 133 

Phelps. Dodge & Company 197 

Pittsburg smoke investigations 38 

Politics and business 164 

Porcupine mines production 815 

Post office regulations 455 

Pre-camhrian 133 

Presidential election 584 

Problem of fines 425 

Progress in Institute affairs 553 

Public lands and the states 785 

Publicity and the Mining Congress 651 

Railroad mineral lands 102 

Railroads, state-owned 683 

Reports issued by mining companies 230 

Rights of the oil men 101 

Rolls at Ohio copper mill 717 

Sampling ore ,,, 230 

San Francisco and the International Engineering 

Congress 329 

School of Mines in Kansas 455 

Senate resolutions regarding American harbors 197 

Sherman anti-trust act 38 

Silverton. Colorado, new custom mill 681 

Smelter fume control 518 

Fume in California .......! 783 

Fume in Chile . , , 749 

Smelting 329 

Smoke problems 38 

Society of Mining Accountants 101 

South African mining conditions 2 

South African Institute of Engineers 2 

South American mining affairs 649 

South American Development Company 102 

Southern Oregon and Northern California Miners' 

convention 102 

Southern Pacific Railroad Company 102 

Stamps and pans and Huntington "mills at Kalgoorlie 616 

Strattons' Independence case 328, 487 

Results 615 

Strike ended at Bingham and Ely 352 

Of miners at Bingham 392 

Of miners at Klv 423 

Sundry Civil bill 71 

Survey and its work 518 



Vol. 105 



Editorial — Continued: Page. 

Taking care of the workman ; . 616 

Tamping drill-holes 134 

Taxes in Arizona 816 

Timber in various counties, scarcity of 552 

Training miners 32S 

United Engineering building 73 

United Shoe Machinery Company 38 

United States oil exports 455 

Presidential election 551 

United States Bureau of Mines 71, 261 

United States Geological Survey 134 

At Hlgn Grade 230 

Reports 197 

Statistics of Colorado 164 

United States Smelting. Refining & Mining Company. 517 

United States Steel Corporation 58:: 

Employees 487 

United Verde Extension Mining Company 197 

University of Illinois 13-! 

Utilization of power 584 

Wages of shovelers in Arizona 615 

War, effect on labor 517 

In Europe 557 

Washington fiscal vear 38 

Water in California oilfields 749 

Western Australia university 293 

Western metal mining 71 

Wet methods of copper extraction 360 

What are mining profits? 424 

Wilson, Woodrow, president-elect being advised 615 

Winoheli's library 2 

Work in engineering 134 

Wyoming Golconda 456 

Yukon transportation 749 

Zinc-dust tariff 815 

Edmunds, H. R Smelting and refining zinc- 
box precipitate 55 

Edwards furnace 325 

Edwards, W. W Stacking hydraulic tailing.... 243 

Effect of copper on steel Kirby Thomas.... 474 

Efficiency of mine employees 614 

Eighth International Congress of Applied Chemistry.... 

Editorial 1 

Filers, A Bag filtration plants.... 431 

El Favor Mining Co 777 

Mine output 611 

El Oro, Mexico 153 

El Oro Mining & Refining Co., report 476, 613, 670 

Output 120, 282. 537. 811 

El Paso Consolidated Cold Mining Co 17. 24. 348, 352. 771 

Mine 157 

Mine sampled 576 

El Porvenir mine in the district of Mallama 

F. P. Gamba. ... I* 

El Rayo Mining & Development Co 129. 777 

El Tigre and the Mexican revolution 483 

El Tigre mine 443, 451 

Mine bullion recovered from rebels 514 

Output 579, 777, 84.'! 

Elbert & Sonne , 127 

Electric hoist with automatic control.. F. C. Perkins.... 490 

Hoisting at the Hecla mine E. M. Murphy.... 434 

Incandescent lamps 486 

Motors, types for compressor service 723 

Pig Iron production at Trollhattan 54 

Power at Tonopah 710 

Power for Rand district. California 807 

Power In Fairbanks mills 839 

Power In Japan 486 

Power In Tonopah mills 829 

Pumps at Golden Cycle mine 675 

Smelting of iron ore E. F. Burchard .. 309 

Electrical factor of safety 116 

Electrification of railroads at Boston 154 

Electrolysis of nitric acid solutions of copper 

J. H. Stansble 800 

Electrolytic copper extraction in Norway 

Charles Adams Holder.... 686 

Copper refining at the Nlkko Copper Works 

Tetsutara Hasegawa. . . . 465 

Deposition of gold in mints 794 

Determination of copper C. E. Travillion . . . . N3(i 

Methods of bullion refining, evolution of 756 

Elements, atomic weights of 692 

Elevation, a unique scheme of . * C. S. Haley. . . . 181 

Elevators and conveyors and other power machinery, 

C. O. Bartlett & Snow Co 682 

Elevator-buckets, life of 194 

Wood 194 

Elliotts Metal Co 57 

Elmore plant at Sulitjelma mine 375 

Process '. 153 

Vacuum plant results 569 

Emerald mines 56 

Mines in the Salzburg Alps 56 

Emmons. W. H. and E. S. Larson .... Geology and ore de- 
posits of Creede, Colorado 333 

Empire mine costs 523 

Mines, G'-ass Valley, cyanide plant at the..: 

Frank A. Vestal 586 

Employment office at Anaconda mine 803 

End of the Simmer & Jack 731 

Engineers' Club Editorial. ... 37 

Erie mine costs 522 

Ernestine Mining Co 27 

Output « 842 

Errors in the determination of moisture in coal 

W. F. Hlllebrand and W. L. Badger.... 626 

Esperanza mine 153 

Output 611 

Estimation of ore in a mine H. S. Munroe.... 18 

Of sodium peroxide H. L. Easton.... 87 

Eucalyptus growing on dredged land 527 

Oil manufacture In New South Wales 194 

Eureka Consolidated mine 460 

Eureka Hill Mining Co 65 

Europe and the Balkan war Editorial.... 585 

European GOYernmen tal regulations regarding lead In- 
dustry 10 

Evans Consolidated Co 122 

Evetts. William Improvements in furnaces.... 592 

Evolution of electrolytic refinery, I. II 

Harold French 754, 791 

Examination for mine technologist 174 

Excursions of the Institute Editorial.... 102 

Experiments on fine precipitate 55 

On short zinc 55 

Exploration in lower California 410 

Explosion-proof motors for mines 823 



MINING AND SCIENTIFIC PRESS 



Vol. 105 



MINING AND SCIENTIFIC PRESS 



Page. 

Exports from Sonora to United States 811 

Exposition 1915, mining exhibit Editorial.... 717 

Extensions of the Lake Copper district 367 

Extraction of tin from ores Edward Walker.... 528 

Eye, C. M Pioneering in the Tropics.... 370 



Factor of safety 

Faithful Surprise Mining Co 

Falmouth mine in Cornwall, ore treatment at 

Fanning, Paul R Colorado mine and mill, Philippine 

Islands 

Fanti mine 

Far East Rand development 

Farmers' Protective Association and the Mammoth 

smelter 

Farraher, J. F..> Railroad mineral lands.... 

Faulty use of certain terms Editorial. . 

Federal Mining & Smelting Co 96, 

Earnings 

Production for 1911-12 

To buy Star mine 

Federated Malay States output 

Fee-simple or absolute title 

Feldspar production in United States in mil 

Use of • 

Ferrobamba mines, Peru 

Ferriera Deep mine 

Ferro-silicon transport 

Feust, Arthur . .Chontales mining district. Nicaragua.... 

Few words about Colombia L. M. I.udoviei . . . . 

Fidalgo-Alaska copper mine 

Fibrosis in mines 

Pilling stopes at Wailii mine 

Filter leaves. of cocoanut matting 

Leaves of corrugated iron 

Operating a stationary H. G. Smith .... 

Operation, recording gauge for 

Staff Correspondence. . . . 

Patent litigation R. R. Reutlinger. . . . 

Suits discussed 

Filters at Mysore mines 

At Tonopah 

Filtration generally discussed 

Financial conditions in New York 

Conditions in United States Editorial . . . . 

Control of copper Editorial.... 

Financing the Institute Editorial.... 

Finding mines Editorial.... 

Fine precipitate, experiments on 

Finlay, J. R What are mining profits?.... 

Fire assay charges D. C. Livingston.... 

At Mt. Lyell mine 784, 

In mines Editoi ial . . . . 

In the West Stewart mine 

Protection, mine 

The Mt. Lyell Melbourne Correspondence. . . . 

Fireproofing cotton goods 

Firing blasts at Panama 

First National Copper Co 

Fisher, W. L Government policy and coal lands.... 

On United States mining law 

Florence Mining & Milling Co. of Montana 

Flotation of minerals Kenneth A. Mlckle.... 

Of ores 

Of ores, factor in 

Patents I. 1). Wolf. . . . 

Flow-sheet of Black Oak Mill 

Fluorspar production in United States in l'.M 1 

Uses of 358. 

Forbes, C. R Mining on the Panama canal ... 

Foreign trade and Canal tolls Editorial.... 

Trade and Panama canal tolls G. McM. Ross.... 

Ditto David Atkins 

Forestry discussion at Mining Congress 

Formosa, coal exports 

Fossil placers in Douglas county Editorial.... 

Foundations by sluicing, excavating 

For stamp-mill at Bishop Creek mine 

Foundaries and machine shops at mines 

Framing shaft-sets Tom McCormac . . . . 

France, imports of copper into 

Mining in Paris Correspondence.... 

Eraser, Jr., Robert Value of the Spanish arroba.... 

Fraser & Chalmers stamp-mill at Yuanmi mine, W'estern 

Australia 

Fraser's mine in Western Australia, sale of 

Free use of timber from public lands 

H. W. MacFarren .... 

Freeport Sulphur Co Editoi ial. . . . 

Freiberg graduates Editorial.... 

Freight rates on ITtah coal, Interstate Commerce Com- 
mission decision regarding .' 

Rates reduction in Alaska 

Fremont Consolidated mine costs 

French, Greeley, death of 

French, Harold California miners' opportunity at 

the Panama-Pacific Exposition 

Ditto Evolution of an electrolytic refinerv, 

I, II 754, 

Ditto Mother Lode of Cue Klondike.... 

Ditto Saving time in the laboratory. . . . 

Friedrichs, Fritz. . . .A convenient telescoping burner. . . . 

Fruit growing on dredged land 

Fruits of violence '.....Editorial.... 

Ft. Bidwell Consolidated Mines Co 

Fuel, power, and water supply of Tonopah 

M. W. von Bernewitz. . . . 

Fuller's earth, production and use of 

Fume at Mason Valley smelter 

Recovered at Murray smelter 

Furnace, Wedge mechanical L. S. Austin.... 

Work at Steptoe. Tooele, Garfield, Great Falls, Can- 

anea. and Anaconda 

Furnaces for melting precipitate in South Dakota 

Fuses at Mother Lode mines, delayed action 

Fushun mines, Manchuria 



11G 

28 
508 

563 
296 
803 

62 
3 46 
816 
417 
743 
576 
S09 

91 



3 37 
300 
355 
671 
291 
720 
312 
807 
30X 
790 
226 
226 
501 

766 
807 
650 
63 7 
829 
751 
80 1 
518 
650 



231 

441 

468 
797 
163 
803 
171 
797 
630 
818 

90 
271 
836 
609 

12 
804 
847 
832 
688 
.312 
389 
sis 
198 
378 
378 
718 
139 
1 

226 
r,(',1 
in t 
116 
410 
44 
633 



148 
540 

89 
328 
517 



59 
129 
522 
678 

735 

794 
15 
208 
667 
527 
488 
95 

7 61 
421 
267 
431 
831 

592 
744 
403 
53 



36 
6 is 



3 I I 

I IS 



G 

Galvanizing iron, new method of 436 

Gamba. F. P El Porvenir mine in the district of 

Mallama 46 



Page. 

Garfield, furnace work at 592 

Garrels, A The Sicilian sulphur Industry. . . . 365 

Garrett, F. C 154 

Garrison, F. Lynwood 232 

Ditto Decrease of value in ore-shoots with 

depth, II 700 

Oitto Persistence of ore in depth. . . . 377 

Oas, definition of 258 

Engines 226 

From an oil well, samples of 100 

From- Texas, analysis of natural 621 

Melting furnaces 258 

Neutralizing at Ashio mines, smelter 240 

Power costs at Waihi 591 

Production in United States, natural 582 

Production of Pennsylvania, Ohio, West Virginia, 

and Kansas 647 

Production of West Virginia 699 

Supply at. Joplin district Editorial. . . . 551 

Supply from Kansas and Oklahoma 509 

Gears, determining pitch Of ...... Douglas Waterman.... 340 

Geber's conception of composition of metals .• 426 

Geiger. A. W Benguet mining district, Philippine 

Islands 786 

Ditto Major mines.... 627 

Ditto Treatment problem.... 767 

General land office at Washington 85 

General Electric Co 

Generators, largest direct-current. General Electric Co 
Genesis of lead-silver ores in Wardner district. Idaho. . 

Oscar H. Hershey. . 

Ditto F. L. Ransome.. 

Geographic basis of industry Editorial.... 3 

Geological lield work' in Alaska, U. S. Geological Sur- 
vey investigations 39!» 

Ditto Editorial 633 

Building 787 

Ditto Editorial. . . . 784 

Geological Survey in California Editorial.... 817 

Geology and ore deposits of Creed, Colorado 

W. H. Emmons and E. F. Larsen .... 333 

Of an oil well section 824 

Of Chontales district, Nicaragua 720 

Of Culebra cut D. F. MacDonald. . . . 726 

Of Ecuador, sketch of the W. A. Wolf.... 110 

Of Hidden Creek, British Columbia 621 

Of Major mines of the Philippine Islands 627 

Of Mother Lode 833 

Of north of Portugal 758 

Of Sudburv district 433 

Of the Besshi mine 363 

i if tlic Miami copper mine M. H. Lovcman. .. lit'. 

of the National mining distiict, Nevada 

Alexander N. Winchell.... 655 

of the Nevada-Douglas mine 206 

German coal production 421 

Pig iron production 121 

Gerni.inv Associated Chamber of Commerce 

Editorial.... 3S 

Gesner on ore deposits 430 

Giant mines 729 

Gibbonsville, Idaho, gold deposits 

Francis Church Lincoln.... 47 

Gillie. John , Work at Butte.... 556 

Gillies Limit opened 282, 289 

Gilmore Mining Co 26 

Gilmour, J. L. and W. H. Johnston Mining methods 

in the Waihi mine ; 789 

Gilpin county ores and their recovery. . .G. E. Collins. . . . 15U 

Gilt Edge-Maid concentrating plant 8S 

Giroux Consolidated Mines Co 64, 97. 12" 

Gitsham process 660 

Globe-Miami district, minis of 23. 

(41obe smelting nnd refining plant 431 

Glover. Walter, death of 130 

Glynn's mine, Transvaal 637 

'Goave,' meaning of term 847 

'Gob,' use of term 681 

Goerz group of mines 382 

Gogo Soco Syndicate. Ltd.. of England X 

Gold and copper in Turkestan 422 

And diamonds in British Guiana 111 

And silver production Editorial.... 816 

And silver, proportions in ores 711 

And soot M. W. von Bernewitz.... 119 

And tin production of Seward Peninsula 115 

Claims in Siberia 761 

Coinage in Colombia Editorial.... 359 

Deposits of Gibbonsville, Idaho 

Francis Church Lincoln.... 47 

Discovery in California 821 

Discovery of Seward 662 

Dredging in the Boise basin of Idaho . .J. H. Miles. . . . 330 
Dredging on the Seward Peninsula. .Charles Janin. . . . 39 i 

Dry concentration of placer F. J. H. Merrill.... 50 

Imports Editorial.... 392 

In Baffin Land 599 

In India 838 

In potassium cyanide, action of oxidizing agents on 

the volicity of solution of 500 

In Seward Sunrise region 686 

In the slate near Valdez creek. Alaska 338 

In the La Sal mountains I. M. Hill. .. 401 

Mining companies in Russia 8 

Mining in Antioquia, Colombia .... Louis A. Maire.... 633 

Mining in Korea J. D. Hubbard.... S3 

Mining in Kyushu 533 

Mining in the Philippines 462 

Mountain of T. A. Rickard.... 89 

Output from Soward 773 

Output of California 1312 800 

Output of California since 1852 821 

Output of Dutch Guiana 753 

Output of Montana Editorial.... 783 

Output of Nome 639 

Output of Transvaal 671 

Output. Southern Rhodesia 57 

Placers of Arizona, dry washings of value 

T. Lane Carter.... 166 

Production in Mexico, increased 729 

Production in Nevada in 1911 214 

Production, Kalgoorlie 92 

Production of Russia 659 

Production of United States from 1792 780 

Production of Western Australia 632 

Production of world in 1911 766 

Production of Queensland 85 

Recovered by amalgamation on the Rand 458 

Value of an ounce 760 



10 



MINING AND SCIEN I 1FIC PRESS 



Vol. 105 



Pass. 

Gold Bank mine 674 

Costs at 523 

Gold Bullion Mining Co Ml 

Gold Chain dividends Jill 

Gold Coast, mining on the 300 

Golden Dream mine at Kalgoorlle 666 

Golden Horse-Shoe mine 153 

Golden Reward company ' 122 

Goldlield district, gold production in 1911 214 

Ooldfleld Jumbo Mining Co 95 

Goldlield-Belmont Mining Co 127 

Goldfield Consolidated Co 27. 64, 100, 353 

Ditto Company Ill-ports 19, 193 

Development 543 

Dividends passed 771 

Mill, operating costs at the 831 

Output 744 

Profits 810 

Iteport for July I. II. Thorn 307 

Report 471. 481, 601. 731 

Goldfields of New Zealand 116 

Goodale, C. W Work at Freat Falls 553 

Goodale, S. L. and H. C. Ray Pennsylvania Smelting 

company plant 104 

Gopher & Boulder mine costs 521 

Government policy and coal lands W. L. Fisher.... 271 

Grading tests by wet and dry methods 389 

Graduate work Editorial.... 134 

Grain of Igneous rocks A. C. Lane.... 458 

Granby Consolidated M. S. & P. Company. Ltd 

23, 97. 120, 1H0. 2ir>. 621, 643 

Ditto Annual report.... 613 

At Joplin / 381, 385. 577 

Equipment for Hidden Creek mines 843 

Mines 670 

Output 288.' 61 Y, 744 

Grand Central dividends 811 

Grand Mining Co. of Pel-Tang and Lanchow 117 

Granite Mountain mini's, history of C P. Bowie 466 

Grants Pass, tin at KM. Parks 181 

Granular rhodonite in California, massive linelv 54 

Graphic representation of oilfield structure....' * 

Alexander J. Heindl.... S24 

Granville Mining Co.. near Dawson. Yukon 216 

Graphite from Ceylon 35 

Paint on steel . , . . . 681 

Gravel excavation, modern methods of.. I'. J. Dennis 136 

In Siveria, handling C. W. Purington. 818 

Great Boulder Proprietary mine 153 

Great Cobar Co '514 

output . . . 7 7 .7 7 77 ! 642 

Selling supplies to employees 616 642 

Great Falls converter 552' 559 

Ditto . .... ....Editorial...' 328 

Converter at Calumet & Arizona smeller .... 530 

Converter at Copper Queen smelter 541 

Converter at Thompson plant ' «10 

Furnace, work at 

Great Fingall mine 850' 806 

Great Fitzroy mines 770 

Greene-Cananea Copper Company. . '.Hi.'ibs, 3Y3'. 443 



Production 



635 



Greenawalt. W. E Name's right' and wrong. ... 441 

Green Consolidated Copper Co r 0fi 

Greenville United report 300 

Growth of the copper industrv . 845 

Guadalajara ' Eiiitnrial So? 

Guggenheim Exploration Co 1 1 al ZVi 

Interests in Arizona , '103 

Gulkana and Susitna placers. Alaska 337 

Guppy P. L. and Douglas Waterman .Separation ' of 

base metals in cyanide solution for quantitative de- 

determination cq7 

Gutenberg, the first printer in Europe'.';;.';; 457 

Gwin mine, costs at VZl 

Gymple gold output ?i» 

Gypsum 3 j2 

Production of Nevada- Doug-las' mine .7 .7 .7 .7 7 7 7 7 207 



Had field's steel invention 

CToifZ' °" - S - 'j--; Unique scheme 'of eievatiori; ', 7. 

Halifax mine development .. 
Hall. Clarence 

Hamilton. t R'^ard '.'.Examining' mines 'in Western 



62!) 
181 
577 
184 



Hammon'.'w.' P ***** Company; ! \ \ 

laMlISn; maohlnoTrnSr * 

pv.n4i, n&r ^, M*** - L , 

Hard^nburg mine. California 

" a MM,r a rM^« w,u . 8 at ^™ chiic.v..;. vvi 

Mine at the B-ndcn min~ . ' "■ 
TTargreave's process ... 

Harper. J., death of 

Hasegawa. Tetsiitara . .'.'. ElectVoly'tic ' copper ' 'refining 
Haskell Pe P ak N, ^n n e r ° PP ° r 

Hayd'r "^or n 4 n Co r ° mPanieS - ' " ' " ' '"" ' 

Copper estimate 7.7.7.7. ' 1 124 ' 

Haz l Mining fi Milling r ~ Editorial. 

it7o1 11 1 ° f mln f r ^, at Mother Lode mine's".'.'.'.'.'.'. 
TIent from sulphides in ores 

tt I / os »/ r " TT1 uncovered steam pipes' 7 7 7 
Hec'n Mining Co. dividend... 

Hed^y e Gold C %%i h n°g Bt Cof * M -' 

Dividends 



5 10 

153 
262 
782 
313 
17 
325 
741 

479 

186 

5«n 

290 



58. 



H * Ind oiWew an 8 trocture 

TIe>nze. F. Augustus and the Stewart Mining Co' 

wSl^i n ^ Frf>d , • •P° p0rt to t,1P standard Mining' Co. 
Henckel on ore deposits 

Henderson. Robert Discoverer ' of ' gold in kiond'v'ke 

valley 

Hendry* agitntor on the Rand 



Heroult electric furnace 
Hersliey. Oscar H. 



Johannesburg correspondence. 



465 
80S 
6(3 
262 

88 
163 
772 
404 
557 
847 
841 
434 

17 
827 

824 
155 
209 
430 

341 

599 
309 
143 



Page. 

Ditto. .Genesis of lead-silver ores In Wardner district. 

Idaho 344 

Herzig. H. S Mining reports. ... 20 

Hess, F. L Prospecting for vanadium.... 366 

Hidden Creek claims drilling results 7 s 

Copper deposits R. G. McConnell . . . . 621 

High Grade district 607. 74 1 

Ditto Editorial.... 230 

Mining districts W. H. Storms.... 273 

Modoc county. California 176 

Hill, George M.. death of 66 

Hill. J. M Gold in the La Sal mountains.... 101 

Hill, Robert T Marbel deposits of the Inyo 

mountains 86 

Hillside mill. California 823 

History of the Granite mountain mines.. C. P. Bowie.... 466 

Hoffmann, Ross B Investigating lower Amur 

region HO 

Hotmail, H. O On copper metallurgy.... 592 

Hoist at Halifax mine, Tonopah 64J 

Hoisting at Butte bv compressed air 

Thomas T. Read.... 554 

Costs at Coeur d'Alene 434 

Engines at Waihi 792 

Water balance at Butte 556 

Holden, A. F.. engineer for the Alaska Gastineau Com- 
pany Editorial.... 

Report on the Alaska Gastineau Co 27, 

Holder, Charles Adams Electrolytic copper extrac- 
tion in Norway 

Hollinger Co Progress report 

Dividends 537, 545 

Mine 152, 218, 379, 380, 509 

Holloway, John Experiments with converters.... 55i 

Ditto". . .Treating sulphides in the Bessemer converter ."• "> 7 

Holman pneumatic stamp 148 

Holmes, J. A Bureau of Mines and Western 

mining JJf 

Homestake company 

Affairs Editorial. 

Christmas gift to employees 

Dividends 

Mine 88, 118, 47d 

Hooper, Speak & Co 21 1 

Hoover, H. C Examining mines.... 6 1 2 

On future of mining 535 

And L. II. Hoover Theories of ore deposition 

prior to the 17th century 426 

Hoover, Theodore J Report on the Zinc Cor- 
poration • • • • 1§« 

Hore, Reginald E Silver mining at Cobalt. Ontario _i4 

Horse-power used in United States mines 0*8 

Horse-Shoe mine, horse-power at 258 

Hot cyanide solutions in treating silver ores 828 

Solutions at Kalgoorlle 8-8 

Hubbard, J. D Gold mining in Korea 83 

Hubbard-Elliott Copper Co ■» 

Hudson Bav Mining Co.. Ltd 1' 

Humboldt Consolidated Gold Mines Co 64 

Huntington mill practice sl * 

Mill practice at Kalgoorlle . . M. W. von Berncwitz. . . . Ill 

Mills at Zuiho mine in Formosa 62u 

Hupp Gold M. Co. placer claims JiJ 

Hydraulic filling in mines j»* 

Hydraulicking on the Panama canal 699 

Hydro-electric companies in Montana 673 

Power consolidation <?' 

Hydrogen peroxide combination with urea 610 

Hvdrometallurgv of copper Edward D. Peters.... 60^ 

Ditto Thomas T. Read. 



262 
2S1 



686 
4 63 



til 
815 
704 
514 



602 



Ice water for miners in hot places 

Idaho, genesis of the lead-silver ores of Wardner dis- 
trict P. L. Ransome 

Gold deposits of Gibbonsville 

Francis Church Lincoln. . . 

Lead production in 1911 

Idaho Gold & Radium Mining Co 

Ideals of imperfection Editorial 

Igneous rock, the grain of A. C. Lane.... 

Ilgner system of hoisting 

Illinois Geological Survey Editorial.... 

Metal production in 1911 

Oil production 

Petroleum fields Editorial 

University of 

Imperator-Quilp Co. suit for damages 

Imperial Copper Co. production 

Imports of copper into France 

Impressions of the Comstock Thomas T. Read.... 

Improvements at Ashio mines and mills. . . H. F. Bain. . . . 

Inambari Gold Dredging Concessions Co 

Increased gidd production in Mexico 

Increasing the dues of the A. I. M. E. . .H. V. Wheeler. . . . 

Independence Mining Co 

India as a precious metal market 

India's gold absorption 

Indian pig iron Editorial.... 

Indian Valley Electric Light & Power Co 

Industrial lead poisoning James O. Clifford.... 

Industry, geographic basis of Editorial.... 

Information to stockholders in mines 

Inspiration Consolidated Copper Co 25, 60, 156, 220. 

Mine .* 237, 

Institute affairs, progress in.... Editorial.... 

And its members Editorial.... 

Cleveland meetings of the 

Constitution and by-laws, proposed changes 

Constitution of the * Editorial.... 

Financing the Editorial.... 

Life membership in the Member. . . . 

Local sections of the Editorial.... 

Management of the Editorial.... 

Meeting Editorial.... 

Institution of Mining and Metallurgy of London, stand- 
ard screens 18, 

Insurance for mine-owners, mutual liability 

Charles E. Parsons, II. and A. J Pillsbury. . . . 

Tntermountain Transportation Co. of Salt Lake 

Internal combustion oil engine W. S. Noyes.... 

International map of the world 

International Association for Testing Materials meeting 

Editorial 



681 

143 

47 
213 

609 
489 

ir,s 

434 
294 
193 
609 
1 

1S4 

544 
533 
410 
244 
239 
545 
729 
409 
96 
845 

v:8 

391 
26 
9 
3 

424 
532 
571 
553 
392 
568 
496 
684 
73 
119 
749 
135 
456 

501 

20 
544 
766 
630 

328 



Vol. 105 



MINING AND SCIENTIFIC PRESi 



11 



Page. 



International Congress of Applied Chemistry meeting 

Editorial .... 1, 

International Geological Congress Editorial.... 

International Nickel Co 

International Smelting & Refining Co 

27, 64, 90, 120, 159, 184, 185. 282, 

Ditto Editorial .... 

Inter-state commerce commission decision re freight 

rates on Utah coal 

Investigation of the Feather river black sands 

Edwin A. Sperry. . . . 

Inyo Mountains, marble deposits of the 

Robert T. Hill..-. 

Iridium production and uses 

Iron and steel in Australia Editorial. .. . 

Imports into Japan 

Industry of Tennessee 

In mill pulp A. McA. Johnston.... 

In mills, source of 

Mine in France 

Mining in Chile 

Movement on Lake Superior 

Ore, electric smelting of 

Ore in Brazil 

Ores of China Editorial. . . . 

Pillar at Delhi, India ••• 

Production at Trollhattan, electric pig 

Range, Cuyuna Kirhy Thomas. . . . 

Sand of Taranaki, New Zealand 

Shipment from Lake Superior mines 

Shipment on Great Lakes Editorial.... 

With cyanide solution, reactions of 

Iron Caps Copper Co 25, 

Irvin, Donald F Disposal of Tailing at El Tigre, 

Sonoroa 

Italian chemists 

Metal imports in 1911 

Ivanhoe mill, breakage of cams at 

Mine at depth 



328 
38 
433 

T38 
360 



59 
624 



86 
389 
199 
533 
500 
463 
463 
645 
462 
591 
309 
8 
3 

291 
54 
52 
667 
254 
518 
463 
94 

727 
194 
389 
258 
701 



.262. 



'7. 2S1, 285, 



Jackling, D. C 

Janin, Charles 

Ditto.... Gold dredging on the Seward Peninsula.... 

Ditto On dredging in Alaska.... 

Ditto On Mine Costs.... 

Ditto Operating costs of California Mines.... 

Ditto What are your mining profits?.... 

Japan, death of Emperor Editorial.... 

Gold movement in 

Mineral production in first half of 1912 210. 

Mineral output 

Production of gold and silver Editorial.... 

Zinc smelting in 

Japanese steel works 

Jardine concentrator made in San Francisco 

Jars on reverbatory furnaces 

Jarvis, C. E Assessment of mining properties. . . . 

Job, sticking to the Joven.... 

Johnson, F. M. G Alumina as a dry agent. . . . 

Johnston, A. McA Iron In mill pulp.... 

Johnston, O. H Tonopah-Belmont mine.... 

Joints in air-transmission lines 

Jones, John P. death of 

Joplin district ore production 

District, progress in the 

District, zinc prices at 

Lead ores 

Ore shipments from Sunny Rrook 

Jumbo mine of Rhodesia, results from 

June-Echo Mining & Milling Co. formed at Spokane... 
Jupiter mine 



Kaleva Mining Co. organized at Lead, S. D 

Kalgoorlie gold production 

Lodes at depth 

Mines, depth of 264, 

Mines, water consumption 

Work effort at 

Kalgoorlie Electric Power & Lighting Co 

Kamloops. British Columbia, centenary .... Editorial ... . 
Kansas School of Mines Editorial.... 

Katalla, Alaska, oilfield Arthur Thompson.... 

Katanga affairs Editorial.... 

Developments 

Kaufman, <C. death of 

Kavanaugh. Thomas, death of 

Kelp deposits Editorial .... 455, 

Kelvin memorial Editorial.... 

Kemp, J. F On ore-shoots in depth 

Kenai Peninsula, mineral resorces of..W. M. Brewer.... 

Kenai Alaska G. Co 

Kenai Dredging Co 

Kennedy, J. C Associated mill. Manhattan.... 

Kennedy mine 461, 

Mine costs 

Kennicott mines 

Kerosene melting furnaces 

Kerr Lake Company ' 573, 

Mine 

Report 

Kershaw, J. B. C 

Keystone mine 

King, E. S 

Ditto On Cornish mines. . . . 

Kirunavaara H. V. Winch ell.... 

Klondike, armiversay of 

Mother lode of the Harold French.... 

Field of Nevada 

Knieht Power Co.. sale of 

Knights Deep and Simmer & Jack mines 

Fire at plant 

Kolar goldfield mines of India 

Kootenay district of British Columbia dividends 

Korea, gold mining in J. D. Hubbard.... 

Korean Exploration Co 

Krupp steel 

Kupronizing process 

Kurnalpi district in Western Australia 

Kyshtim copper production 

Kyshtim Corporation, Ltd., report 



509 
391 
394 
607 
517 
520 
570 
133 
404 
224 
626 
551 
630 
453 

51 
592 
210 
505 

53 
463 
247 

35 
745 
637 
599 
248 
503 
508 
838 
578 
671 



810 
92 
701 
310 
442 
134 
350 
488 
455 
169 
392 
408 
712 
644 
4S3 
229 
700 
662 
94 
25 
108 
575 
522 
94 
258 
579 
216 
445 
309 
460 
508 
53 8 
82 
387 
15 
710 
544 
731 
604 
.264 
777 
83 
84 
629 
14 
349 
621 
517 



Page. 

Labarthe, Jules 267 

Labor at Kalgoorlie 350 

At Panama 81S 

In British Guiana 145 

In Nicaragua 722 

Required by statute on unpatented mining claims.... 748 

Laboratory, saving time in Harold French.... 209 

La Fortuna mine F. .1. Martin.... 7 

La France Copper Co 64, 90, 12 1 

Mine sold 803 

Suit 673 

La Plata county, Colorado, bismuth ore 142 

La Rose Consolidated Mines Co 65, 100, 772, 777 

Development 643 

Mine 75, 380, 573. 579 

La Sal mountains, gold in the J. M. Hill.... 401 

Lake county, shortage of labor in 154 

Lake Superior mines 23:; 

Lake Superior Mining Institute Editorial.... 293 

Meeting 316 

Lake Superior & Arizona Mining & Smelting Co 94 

Lake View & Oroya Exploration Co 672, 805 

Lake View & Star mine 350 

Lamb, M 308 

Lamps, metallic fillament from Germany 748 

Lanceheld mine 92 

Lanchow Mining Co 117 

Land fund of the Institute Editorial.... 165 

Laws in the United States 134 

Lan'dor Copper Co 63 

Lands, free use of timber from public 

II. W. MacFarren . . . . 89 

Railroad mineral Editorial.... 102 

Lane. A. C 424 

Ditto Grain of igneous rocks.... 458 

Ditto Mine Waters ... . 589 

Lane mill at Chosen Mining Co.. Korea 745 

Langage, British Kalgoorlie correspondent.... 89 

Lapland, Swedish 82 

Larcombe, C. O. G. 308 

Large synchronous motors for compressor servic e 

Gerard B. Rosenblatt.... 723 

Largest direct current generators 

General Electric Co ills 

Larsen, E. S., and W. H Emmons Geology and ore 

deposits of Creede, Colorado 333 

Launders 160 

Riffle tables and 35 

Laundry machines at U. S. Treasury 389 

Law, Arizona mining Editorial.... 37 

Laws of crushing 760 

Lawson. Thomas W 412, 506 

And Bay State Gas Co 740 

Leaching chrysocolla at Butte 737 

Ore at the Shannon mine 799 

Vats, cocoanut matting for 258 

Lead and zinc production by regions 

B. S. Butler and J. P. Dunlop.... 342 

Acetate in cyanide plants 226, 597 

Composition of sublimed white 780 

Fire-assay for 489 

Industry, European s-overnment regulations re 10 

Market 504 

Ditto Editorial 360 

Mining in Missouri Editorial.... 39 

Ores, Joplin 503 

Output of Burma 827 

Poisoning, industrial James O. Clifford.... 9 

Prices and production L. Vogelstein & Co 205 

Prices at Joplin 481 

Production in 1911 600 

Production in Idaho in 1911 218 

Production in Nevada in 1911 243 

Silver ores, Wardner district, Idaho, genesis of. . . . 

F. L. Ransome.... 143 

Smelting, profits in L. L. Wittich.... 503 

Specimens in museums, deterioration of 780 

Leadville as a zinc producer 494 

Geology 232 

Mines in July 221 

Ore production 640 

Production in 1911 ! 180 

Leasing system Aniak 89 

Ledoux. A. R Short-circuiting in anode tanks.... 52 

Leggett, J. H Reclaiming dredged land 518, 527 

Leith, C. K 1 S3 

Lena Gold Mining. Company of Siberia 433 

Lett, Stephen J Persistence of ore i/i depth.... 801 

Lewis & Sons, James, copper report 

98, 193, 324, 422, 547, 679, 845 

Lexington Mines Company 64 

Liability for accidents, mine -owner's . A. J. Pillsbury.... 56 

Insurance for mine owners, mutual 

A. J. Pillsbury and Charles E. Parsons, 2nd 20 

Library, N. H. Winchell's Editorial. ... 2 

Life extension and ore reserves Morton Webber. . . . 492 

Appraisal of mines on Curie's method 492 

Of a mine 492 

Membership in the Institute Member. . . . 119 

Light prospecting drill R. Y. Hanlon. ... 17 

Lightner mine costs 522 

Lilly, W. J. work at Butte 556 

Lime consumption in treating certain ores 205 

In cyanide treatment 8-14 

Limestone deposits in U. S 647 

Lincoln, Francis Church Gold deposits of Gibb- 

bonsville. Idaho 47 

Lincoln Consolidated Co 415 

Lincoln Trust Co. of New York 90, 124 

Lindgren, W 311 

Liquor bv railroad employees, prohibiting use of 

Editorial 230 

Linton, Robert....' Cyanidation of concentrate.... 437 

Lithium carbonate, use for 8 47 

Salts 35 

Litigation at National, Nevada 54 

Little Nellie mine 126 

Livington, D C Fire-assay charges.... 46S 

Ditto.....' Ore reserve and life extension.... 669 

Llano, Texas, asbestos properties near 11 

Loans for China and New York state Editorial.... 615 

Local sections of the Institute Editorial.... 719 

Locke, Augustus Tuolumne Table mountain.... 85 

Log of an oil well in California 824 

Lohneys on ore deposits 430 

I.omax, James 154 



12 



MINING AND SCIENTIFIC PRESS 



Vol. 105 



Page. 

London copper 23 

Lonely mine development Jjl 

Lonely Reef mine 265 

Los Angeles Chamber of Mines and Oil 783, 807 

Bhumway concentrator made in BO 

I.oretta company 125 

Lost Packer Mining Co Company reports. . . . 813 

I.oveman. M. H. . .Geology of the Miami copper mine. ... 146 

Low. F. V. Stanley 134 

Low-grade ore treatment at Kalgoorlie 666 

Lowland Tunnel, Water <Sr Transportation Co. formed at 

Salt Lake 677 

Lubrication of machinery 681 

Lucky Gulch near Valdez creek, Alaska, mining at.... 342 

Lucky Tiger-Combination Gold Mining Co 65 

Output 289 

Ludovica, L. M A few words about Colombia.... 312 

Luning Gold Mines Co 127 

Lunkenheimer 'puddled' semi-steel valves, manufac- 
tured by Lunkenheimer Co.. Cincinnati. Ohio 716 

Lunt, Horace F CrippTe Creek history .... 570. 634 

Ditto Drilling contest records.... 150 

Lure of mystery Editorial.... 393 



M 



MacDonald, Bernard Veta Colorado mill 

and eyanidation plant — I. II 4 

MacDonald. D. F Geology of Cub-bra cut. . . . 

MacFarren, H. W Free use of timber from 

public lands 

Machine drill footage 

Results at Alaska Tread well 

Machine .hilling v. hand drilling 343, 

Machinery in the Transvaal 

Noise of 

Maclaren, Malcolm Persistence of ore in depth.... 

Madden, William O.. death of 

Magazine and thaw-houses for explosives 

Magma Copper Co 

Magnesite supply 

Magnet to remove steel from ore on belt conveyor 

Mahnes. M.. converter 

Maire, Louis A. .Gold-mining in Antioquia, Colombia.... 

Ditto . .Mining conditions in Antioquia. Colombia.... 

Major Mines A. W. Geiger.... 

Malcolmson, J. W The American Institute of 

Mining Engineers 

MaHama, El Porvenir mine in tile district of 

F. P. Gamba 

Mammoth copper production 

Mammoth smelter and the Farmers' Protective Associa- 
tion 

Mammoth Copper Co 90, 

Management of Rand mines 

Mancar at Mt. Morgan 

Manchuria coal supply of Edward di Villa. . . . 

Fushun Mines 

Manganese deposits of the Caucasus 

Frederic W. Cauldwell. . . . 

Dioxide in smelting zinc sludge 

In the Philippines 

Ore exports from India 

Ores in 1911, production of 

Production of Russia 

Steel 

Use of 

Manganese Producers' Association 113, 

Manhattan Associated Milling Co 

Mill J. C. Kennedy 

Manhattan Big Four Co 

Mann, E. A 

Manzanita Hydraulic Co 

Marble deposits of the Invo mountains 

Robert T. Hill. . . . 

Production of U. S 

Market support Mark E. Davis.... 

Martin. F. .1 La Fortuna mine.... 

Mary McKinney mine 

Output 

Mascot Copper Co 

Mason Valley mines 27, 

Copper smelter Thomas T. Read 

Smelter 97, 

Massive finely granular rhodonite in California 

Mathewson. E. P Development of the 

reverberatory copper smelting furnace 

On power plants 

Work at Great Falls 

Matte, converters for copper Editorial.... 

McCarthy, M. E., death of 

McConnell, R. G Hidden Creek copper deposits.... 

McConnell mine 

McCormac, Tom. .. .Churn-drilling in ^haft-sinking. . . . 

Ditto Frame shaft sets.... 

Ditto Placing shaft sets.... 

McDonald, II. T Saurer truck at 

Plumed Knight mine 

McEneany mine 509, 

Mine reserves 

McGee, W. J., death of 

McGill University investigations on rock-crushing 

Mclntyro mill 

McKinley-Darragh mine 75. 

McLain. G. B Specific gravity chart.... 

McLaren, Alex Valuation of mines.... 

MeMartin-Tinimins-Dunlap Syndicate 

McMorris mine 

McNab. A. J 

Measure of precision Editorial. . . . 

Ditto F. P. Rolfe 

Ditto : . . . .Blarney Stevens. . . . 

Measurement of stream flow 

Medal, a souvenir 

Meier on ore deposits 

Melones mine costs 

Melting points of rare metals 

Membership in the Institute, life Member.... 

Men employed in Amador county, California 

Mercury loss at Homestake mills 

Merricks, Crane & Co 

Merrill, C. W Work on filters 

Classifiers at Empire mine 

Merrill, F. J. H...Dry concentration of placer gold.... 
Ditto Miners' side of the Hast Tintic decision.... 



40 
77H 



69 
3S9 
358 
681 
J7.X 
531 
778 
214 



226 
600 
522 
63 3 
536 



151 

46 

562 

62 
480 
413 
631 

53 

S3 

113 
258 
376 
560 
53 
666 
629 
847 
114 
108 
108 
3 NT, 
308 
575 

86 

780 
832 
7 

157 
675 

61 
610 
267 
477 

54 

592 
584 
5 53 

71 
160 
621 
127 

45 
116 
405 

131 
514 
707 
321 
760 
509 
153 
150 
634 
90 
94 
267 
734 
471 
733 
748 
703 
430 
521 
629 
119 
839 
762 
508 
650 
586 
50 
303 



Page. 

Messina Development Co.. Ltd.. Company reports .... 704. 813 

Metal, analysis of white 757 

Industries of Germany 681 

Markets Editorial 717 

Mine production of California ... Charles G. Yale.... 370 

Mining in Missouri 67 

Mining in Oregon 321 

Mining. Western Editorial. .. . 71 

Production of U. S. from the beginning SH 

Production, South Dakota 88 

Metallic minerals of Brazil 528 

Metallurgy it Bendigo M. W. von Bcrnewltz. . . . 200 

At Homestake Editorial.... 749 

At Tonopah M. W. von Bernewitz. . . . 82x 

New H. Stadler.... 78 

'Metals in process." meaning of term 814 

On soluble surfaces, deposition of 194 

Mexican affairs 745 

And California petroleum 59* 

Commerce in 1911 Editorial.... 391 

Conditions 603. 675 

Ditto Editorial 488 

Ditto luan Felix Brandes.... 767 

Ditto G. L. Sheldon 66S 

Custom duties Editorial.... 815 

Revolution 413 

Tax on crude ofl exports 443 

Troubles 347 

Ditto Editorial 360 

Mexican Gold & Silver Mining Co... Company reports.... Sll 

Mexican Institute of Mining & Metallurgy 

Editorial. . . . 1"-' 

Mexican Northern Power Co lilt 

Mexico Editorial.... 29 i 

Affairs affecting investment generally 155 

Mineral production In 1911 224 

Mines of El Oro 349. SEE 

Oilfields 15.". 

Veta Colorado M. & S. Co. at Parral 40 

» Veta Colorado M. & S. Co.. Chihuahua 4 

Mezquital del Oro mines 635 

Miami Copper Co 60, 125, 351 

Concentrator 600 

Copper mine, geologv of M. H. Loveman.... 146 

Mine 156, 237 

Production 220, 531, 571, 639 

Work 479 

Mica, uses of 358 

Mickle, Kenneth A Flotation of minerals.... 12 

Microscope used In examination of coal 151 

Middling re-treatment plant at Tomboy mine 286 

Midyear spelter statistics. 1912 149 

Mildred mine 25 

Miles. J H Gold-dredging in the Boise Basin 

of Idaho 330 

Milford, Leslie Russell Modified llunsen valve.... 669 

Mill and eyanidation plant — II, Veta Colorado 

Bernard MacDonald.... 40 

At Ontario mine. Utah : 711 

At Three Nations mine 811 

At Tomboy mine 820 

For Inspiration Co 839 

Improvements at Wanakah mine 742 

Pulp, classification of 226 

Pulp, iron in A. McA. Johnston.... 463 

Testing at Flat River. Missouri 751 

Work at Fairbanks 835 

Milling at Miami. Oklahoma 73S 

In Leadville 808 

Plants of the Oriental Consolidated. I'nsan. Korea.... 

A. E. Drucker. . . . 

Mills at Tonopah 828 

Report Cripple Creek district 63 

Source of iron in 463 

Mills, L^nited mine 642 

Milton, M. C A mine model.... 33S 

Minas Tecolotes y Anexas 129 

Mine-air humidifier, a new type of 569 

Bell signals, sale of patent enamel 

J, W. Stonehouse 682 

Employees, training of M. W. von Bernewitz.... 336 

Estimation of ore in a H. S. Munroe. . . . I s 

Fire protection 171 

Fires 614 

Inspectors at Joplin Editorial.... sir. 

Investors' protection, discussion at Mining Congress 71S 

Model M. C. Milton.... 

Owners' liability tor accidents A. J. Pillsbury . . . . 

Owners' mutual liability for 

Charles E. Parsons. 2nd. A. J. Pillsbury.... 20 

Owners' Association for Utah : 487 

Production in Colorado 180 

Rescue conference at Pittsburgh Editorial.... 487 

Rescue Editorial.... 197 

Rescue work 533 

Technologist, examination for 174 

Valuation •" 781 

Water at Butte, precipitation of copper from 404 

Water A. C. Lane 589 

Mineral deposits in Turkey 45 

Discoveries in Arabia 376 

Industry of California. 1912 800 

Land law of Queensland 440 

Land law, revision" of the 685 

Lands, railroad Editorial 102 

Metamorphism. alleged chemical effects of pressure 

on |73 

Output of certain states 660 

Output of Japan 626 

Production for 1911 1*1 

Production of China < 6» 

Production of Japan 210 

Resources of Siberia 838 

Resources of the Copper River basin 526 

Resources of the Kenai Peninsula. .W. M. Brewer. . . . 662 
Sulphates and arsenates on cyanide solutions, action 

of Andrew F. Crosse.... 16 

Water of Argentina, investigations of 725 

Water production of United States 453 

Wealth of California 822 

Mineralogy of Hidden Creek rocks. British Columbia... 622 

Minerals, flotation of Kenneth A. Mickle.... 12 

Minerals Separation, Ltd 314 

Flotation process J- 4 

Process 

Minerals Separation American Syndicate, Ltd 



33 S 

56 



153 



Vol. 105 



MINING AND SCIENTIFIC PRESS 



13 



Page. 

Miners' accident relief fund in New South Wales 770 

In coal mines in U. S 516 

Phtiiisis in Western Australia 308 

Phthisis Act on the Rand 413 

Side of the East Tintic decision 

F. J. H. Merrill. . . . 303 

Strike at Bingha'm 411, 419 

Strike at Porcupine 707, 777 

Mines and minerals of California Editorial.... 684 

Conditions governing costs of California 520 

Have three phases of existence' 495 

In southern Spain E. J. Norton.... 375 

Of Benguet, Philippine Islands 787 

Of North China 117 

Of the Globe-Miami district F. C. Calkins 237 

Of the Republic district, Washington 

Sidney Norman.... 235 
Of the Yerrington district .. Staff correspondence.... 177 

Valuation of Alex. McLaren.... 634 

Mines & Metal Co 27 

Mines Development Co 28 

Mines Company of America, dividends 811 

Production for half-year 579 

Mines Operating Co 450, 574, 578 

Mines Trials Committee of the Rand 501 

Tests on agitator 599 

Mining at Champion mine, Grass Valley 608 

At Chontales, Nicaragua 722 

At Cobalt. Ontario, silver Reginald E. Hore.... 74 

At Copper Queen mine 807 

At Cripple Creek William H. Storms.... 14 

At Flat river district. Missouri 738 

At Klonrivke district. Nevada 810 

At Leadville 840 

Booms 258 

By boat Editorial 229 

Conditions in Antioquia, Colombia P. J. Eder. . . . 733 

Ditto Louis A. Maire 536 

Conditions in South Africa Editorial.... 2 

Costs at Cananea 566 

Districts, Western 85 

Tn British Columbia in 1911 259 

In Burma .* 827 

In Chihuahua generally 745 

In Chile 670 

In France Paris correspondence.... 44 

In India 523 

In Korea 440 

In Korea, gold J. D. Hubbard.... 83 

In Minas, state of Brazil 2X0 

In Missouri, lead Editorial.... 39 

In Missouri, metal 67 

In Syria 4 62 

In the Urals St Petersburg correspondence.... 621 

In Transvaal in 1911 246 

In Turkey 615 

In Venezuela 660. 661 

In Victoria, Australia 740 

In Victoria, prospects of 797 

In Western Australia 495 

In Western Australia in 1911 245 

In Wyoming 478 

Law, Arizona Editorial.... 37 

Law of United States 836 

Laws, Australian A. Montgomery.... Ill 

Laws in Alaska Editorial.... 294 

Laws in California 780 

Laws of Peru 793 

Methods in the Waihi Mine 

James L. Gilmour and W. 11. Johnston..,. 789 

On the Gold Coast 300 

On the Panama canal C. R. Forbes.... 818 

Plants, switchboards for small 35 

Profits, what are J. R. Finlay.... 441 

Ditto Charles Janin.... 570 

Ditto Ernest V. Orford. . . . 801 

Progress in Rhodesia. .South African correspondence 729 

Prices of molybdenite 582 

Regulations in British Guiana 145 

Reports C. S. Herzig. . . . 20 

Taxation in Nevada 776 

School, research in the R. C. Benner. . . . 182 

Mining & Metallurgical Club of London 526 

Mining and Metallurgical Society 134 

Mining Congress at Spokane Editorial.... 718 

Publicity and the Editorial.... 651 

Mint at Denver 794 

Philadelphia 794 

San Francisco 794 

Mints of the United States, work at 847 

Missouri, metal mining in 67 

Kansas-Oklahoma district production 381 

Lead mining in Editorial.... 39 

Moctezuma Co 635 

Modderfontein Deep cuts rich ore 382 

Modern methods of gravel excavation 

F. J. Dennis. ... 136 

Modified Bunsen valve Leslie Russell Milford. . . . 699 

Moebius system of refining bullion 756 

Molybdenum in United States 659 

Researches on 629 

Uses of 226 

Mond Nickel Co 283. 772 

Mongolia, platinum deposits in St. Petersburg 

correspondence 597 

Montana, silver production in 1911 180 

Wants an experiment station Editorial.... 229 

Montana Power Co 650 

Montana-Tonopah Mines Co 125, 127, 513 

Montgomery, A 134, 141, 308 

On mines of Western Australia 700 

Morley, F. H Outcrops of precious metal veins.... 368 

Morro Velho mine of St. John del Rey Co., depth of. . . . 264 

Moore Butters decision Editorial.... 649 

Text of 663 

Moore Filter Co. v. Tonopah-Belmont Co. defended by 

Butters Filter Co 617 

Wins suit Editorial 583 

Moore process 801 

Moore, George Work on filters. . . . 650 

Morse, C. W Work along the Mother Lode.... 403 

Mortar-boxes setting on foundations 847 

Mortson, O.. C, death of 809 

Mother Lode counties' ore production 520 

And ore-shoots in, extent of 459 

Of the Klondike Harold French.... 15 

Possibilities in depth W. H. Storms. . . . 459 

Work along the C. W. Morse 403 



Page. 

Motor control witli the Thury system 49" 

Discussion, for mine work "24 

Drive for cam-shafts at Homestake 847 

Drive for rock crushers 469 

Truck tests for army maneuvres International 

Motor Co. of New York 390 

Motors, explosion-proof 780, 823 

Large synchronous, for compressor service 

Girard B. Rosenblatt. . . . 723 

Moulton mill, tube-mills first used at 35 

Mt. Bischoff Tin Mining Co 387 

Mt. Champion Mine 126 

Mt. Elliot output 

Mt. Lyell, affairs at 642 

Fire Editorial 784 

Ditto Melbourne correspondence.... 797 

Mine 316, 355 

Operations at 218 

Troubles witli men 605 

Mt. Morgan Gold Mining Co., Ltd 246, 348, 355 

Mine 494 

Output 563, 642 

Turbo-blower plant 500 

Mountain of gold T. A. Riekard.... 89 

Mountain Copper Co 480 

Copper production 562 

Mountain, Tuolumne table Augustus Locke.... 85 

Montain Queen mine 92 

Mine, Western Australia, treatment plant at 

M. W. von Bernewitz . . . . 148 

Moyer, C. H 509 

Munroe, C. E 272 

Munroe. H. S Estimation of ore in a mine.... 18 

Murphy. E. M Electric hoisting at the Hecla mine. . . . 4S'4 

Mutual liability insurance 1 for mine-owners 

A. J. Pillsbury. Charles E. Parsons, 2nd. . . . 20 

Mysore Mining Co. results 408. 52.". 

Mystery, lure of Editorial ... . 393 



N 



Nacozari Con. Copper Co 

Names, right and wrong W. E. Greenawalt . . . . 

'Nation's Business,' new paper at Washington 

Editorial .... 

National, litigation at 

Mining district, Nevada, geology of 

Alexander N. Winehell . . . . 

National Asbestos Co 

National mines suit decision Editorial.... 

Natives of Benguet, Philippine Islands 

Natomas Consolidated dredge. No. 7 

No. 10 dredge yield 

Output 

Rock-crushing plant 

Natural circulation of cooling-water 

Gas Editorial .... 

Neuquen territory, Argentina coal in 

Neutralization of smelter gases. .George C. Westbey.... 
Nevada Editorial.... 

Antelope mining district 

Associated mill. Manhattan J. C. Kennedy.... 

Copper production in 1911 

Gold production in 1911 

Lead production in 1911 

Number of mines producing in 1911 

Potash deposits cause of formation in 

Potash explorations in 

State affairs Editorial.... 

Zinc production in 1911 

Nevada-California Power Co 

Fire at station 

Sub-staticn burnt 

Supplv 

Nevada. Coal & Fuel Co. starts shipping 

Nevada Consolidated Copper Co 97, 120, 128, 506, 

Bullion tax 

Dividend '. 

Explosion 

Mine 

Mines strike over 

Quarterly report 182, 

Work and strike 

Nevada Deep Mines Co 

Nevada Des Moines M. Co. development 

Nevada Douglas...-. Company reports.... 

Dividend 

Mine in Yerington district 

Mines . . '. 449, 

Mines Thomas T. Read.... 

Output 

Nevada Hills Co 27, 189. 

Output 

Nevada State Journal souvenir edition Editorial.... 

Nevada Utah Mines & Smelter Corporation 

Nevills, W. A., death of 

New copper district in the Caucassus 

St. Petersburg correspondence.... 

Dredge in Alaska 

Metallurgy H. Stadler. . . . 

Method of galvanizing iron 

Power plant. Scottish Gympie 

Rand near Denver Editorial 

Tvpe of mine-air humidifier 

Type spiral riveted pipe.... The Standard Spiral Pipe 
Works, Chicago 

Work at Aspen 

New Chuquitambo Gold Mines of P3ru 49. 571. 

New Era Mining Co 

New Jersey Zinc Co 

New Kleinfontein mine 

New Mexico, metal production in 1911 

Mining in 1911 

New Mine Sapphire Syndicate of Montana 

New North Boulder mine 

New Modderfontein mine 

New South Wales, antimony mining in ..J. E. Carne.... 

Coal, output of 

Mineral output 

New York copper market 24. 90, 

Meeting of the Institute 

New York & Honduras Rosario Mining Co 

New Zealand gold output 

Newhouse tunnel at Idaho Springs Editorial.... 

Newspaper T. A. Riekard.... 



29 
441 



359 



54 

65.". 

1 1 
552 
786 
709 
626 
575 
60S 
601 
3 

53 
524 
163 
17" 
LOS 
247 
21 1 
21.". 
17 1 
502 
827 
815 
211 
125 
71" 
577 
761 
710 
706 
61" 
771 

64 
155 
57 S 
641 
544 
128 
676 

739 
177 
577 
206 
641 

4 4 :> 

577 
163 
92 
130 

654 
94 
78 
436 
80" 
1 

5 69 

300 
.101 
82" 
61 
22 
78 
215 
324 
743 
777 
476 
72S 
4 65 
56" 
12" 
472 
837 
387 

457 



14 



Page. 

Nicaragua Editorial .... 294, 717 

Conditions in Editorial.... 391 

Prospecting in W. A. Connelly.... 373 

The Ohontales mining district of . .Arthur i'Vust . . . . 720 

Trouble in Editorial ... . 230 

Nicholas, A. M Work on filters.... 650 

Nickel coins in Prance 291 

Deposits of China 100 

District, Ontario, Canada. Sudbury 

Kirby Thomas. . . . 433 

Exports from New Caledonia 470 

In United States 659 

Supply, Canada and t lie 669 

Nickel Plate mine 190 

Nickerson, R. C 99 

Nigerian tin production 49 

Nikko copper works, electrolytic copper refining at.... 

the Tctsutara Hasegawa.... 465 

Nipissing Mines Co 348, 350 

Ditto Company report.... 227 

Dividend 611 

Mine 75. 153, 573 

Mini', silver shipments 545 

Output 811. 843 

Sluicing at the 677 

Nitrate exports from Chile 54 

Production in Chile in 1911-12 376 

Production of Chile .' 736 

SaJts 516 

Nitrates 35 

Nitrogen from air 629 

The utilization of atmospheric 19 

Waste in making coke 480 

No intentional misrepresentation 

. .I,conJ. Pepperberg. . . . 832 

Noble Electric Co. results 384 

Nome customs report 667 

Mining 415 

Steamers Editorial.... 327 

Noidberg Manufacturing Co 152 

Norman, Sidney .. .Mines of the Republic district. Wash- 
ington 235 

Nordberg, Bruno V Work on hoists .... 554. 555 

North Butte Mining Co.. quarterly report of 152 

Mine 507, 512 

North China, coal mines of 117 

North Nuggety Ajax scandal 218 

North Star mine costs 523 

Mine dividends 675 

North Washington Power & Reduction Co 28. 483, 837 

Northern California Power Co 741 

Northern Territorial Railway Co 129 

Northwestern Diamond Drill Contracting Co 29 

Norton, E. J Mines of Southern Spain.... 375 

Nourse Mines. Ltd Company reports.... 813 

Nowata Lead & Zinc Co. at Duenweg shaft sinking at . . . . 211 

Nowata Mining Co. development 637 

Noyes, W. S An internal combustion oil-engine.... 766 

Nuggets from Bendigo, Australia 814 

In Australia 740 







Ohio Copper Co 21, 24, 60, 90, 120, 155, 284 

Mill-work 842 

oil consumption in oil-engine in Texas 766 

Engine, an internal combustion U. S. Noyes.... 766 

Exports from Mexico 635,669 

Exports, United States Editorial.... 455 

Firing for furnaces Editorial ... . 784 

(rusher in Japan 765 

In Taraaakl, New Zealand 703 

Lands in Utah Editorial.... 197 

Lands, withdrawal in California 807 

Men, rights of the Editorial.... 101 

Production of Baku 681 

Production of California 774. 800 

Production of Rumania 458 

Used at Tonopah 761 

Psed in smelting work 594 

Well, samples of gas from 100 

i 1 i 1 field structure, graphic representation of 

Allen .1. Ileindl . . . S24 

Of Katalla, Alaska Editorial.... 359 

Ditto Arthur Thompson.... 169 

Okhotsk Gold Mining Co. in Siberia, drag-line excavator 

at 212 

Old Alpha Copper Co 24 

Old Dominion Copper M. & S. Co 120 

Old Dominion mine 125, 166, 221. 237. 317. 568, 571 

Production 532 

Smelter 60 

Oliver, E. L Work on filters.... 650 

Oliver continuous filters at Empire mine 586 

Oliver Iron Mining Co 573 

Olympic games and general feeling over results 

Editorial. ... 518 

Omaha bag-house system 432 

Ontario mineral output 491 

Ore treatment 574, 578 

Canada, Sudbury nickel district .. Kirby Thomas.... 433 
Silver mining at Cobalt Reginald E. More.... 74 

Operating a stationary filter H. G. Smith.... 501 

Costs at the Goldfield Consolidated mill 831 

Custs of California Mines Charles Janin.... 520 

Ophir cyanidation plant at Virginia City 703 

Ophir Co Annal report.... 841 

Report 544 

Ore at depth, persistence of Editorial.... 261 

Bins in Waihi mines 792 

Chutes, choking of 662 

Continuity in earth movement deposits 494 

Continuity in infiltration deposits . 494 

Continuity in replacement deposits 494 

Cyanidation of pyritic F. B. Reece.... 77 

' Definition of 232 

Deposition prior to the seventeenth century, theories 

of II. C. and L. H. Hoover 426 

Deposits at Yalwal, in New South Wales 740 

Deposits at National. Nevada 658 

Deposits of Creede. Colorado 333 

Deposits have four horizons 495 

In a mine, estimation of H. S. Munroe.... 18 



Vol. in". 



Page. 

In depth, persistence of George E. Collins.... 40!t 

Ditto Malcolm Maclaren.... 534 

Ditto T. A. Kickard 232. 264 

Prices at Joplin 353 

Production in Wyoming Editorial.... 816 

Production of Silesia 686 

Reserves and life extension D. C. Livingston.... 668 

Ditto Morton Webber . . . . 4 92. 669 

Reverves exhaustion not depreciation in value of mine 

Editorial .... 683 

Reserves at Kalgurli mine 906 

Reserves of the Shannon mine 798 

Shipment from Joplin 508 

Shoot outcrops in Mother Lode 459 

Shoots at Butte 700 

Shoots at depth in Mexico 102 

Shoots, decrease of value with depth, II 

F. Lynwood Garrison.... 700 

Treatment at Creede, Colorado 333 

Treatment at Falmouth mine in Cornwall 508 

Treatment at Sunny Brook. Joplin 508 

Treatment chart, Taracol mill, Korea 654 

Treatment in Rhodesia 614 

Treatment in the Philippine Islands 564 

Water as an indication of George E. Collins.... 441 

Oregon, metal mining in S24 

Ores and minerals, current prices of 162 

In 1911. production of manganese 53 

Of Hidden Creek. British Columbia 623 

Of Tonopah, description of 828 

Orford. Ernest V What are mining profits?.... 801 

Oriental Consolidated Mining Co 83, 355, 440 

Milling plants of A. E. Drucker.... 562 

Oroville Dredging Co. output 541 

Oroya Leonesa mine 777 

Oroya ore shoot at Kalgoorlie 535 

Ooregum mine, India 668 

Orsk Gcldfields Company 140, 217 

Osceola mine 233, 640 

Ostemah mine costs 5S3 

Ouray county in 1911, production of 222 

Outcrops of precious metal veins F. H. Morley.... 368 

Oxalic acid from wood r 847 

Oxford and Gerold claims case Editorial. . . . 683 

Oxidized ores of Kalgoorlie, description of 618 

Ozark Smelting & Mining Co 641 

Ozokerite mines in Utah 513 



P 



Pachuca and Parral systems 42 

Pacific Gas & Electric Co 575 

Pacific Smelting Co Courtenay De Kalb.... 602 

Palladium, uses of 647 

Panama Canal Editorial.... 133 

Hydraulicking on the 699 

Work Editorial 293, 583 

Mining on the C. R. Forbes.... 818 

Tolls Courtenay De Kalb.... 214 

Ditto Editorial 814 

Panama, one mine operating In 11 

Panama-Pacific Exposition Editorial.... 72 

Paper-pulp mills of Sweden 681 

Paracale Bucket Dredging Proprietary Co 769 

Park City district of Utah 354 

Parks. H. M Tin at Grant's Pass.... 181 

Parral and Pachuca systems 42 

Mexico, Veta Colorado M. & S. Co. at 40 

Parsons & Co., C. A., blowers 500 

Parsons. Charles E., 2nd Mutual liability in- 
surance for mine-owners 20 

Patent laws Editorial.... 583 

Monoply Editorial 38 

Protection in the United States 617 

Patents and litigation Editorial.... 617 

Pearce, Richard Development of furnaces.... 592 

Pearl Lake mine 509, 514 

Peat production in United States 516 

Peerless mine, amblygonite 35 

Pellam, H. O., death of 260 

Pellas, F. A., death of 290 

Pembrey copper works, suspension 57 

Penn Chemical Co. smelter 563 

Penn Mining Co 95, 125 

Pennsylvania Smelting Company plant 

S. L. Goodale and H. C. Ray ml 

Penoles Mining Co 635 

Pepperberg, Leon .1 ..No intentional misrepre- 
sentation 832 

Percentage of silver to gold in Tonopah ores 828 

Perkins, F. C Electric hoist with automatic 

control 490 

Peroxide, estimation of sodium H. L. Easton.... 87 

Persistence of ore, definition of 232 

Of ore in depth G. E. Collins 409 

Ditto Stephen J. Lett 801 

Ditto Malcolm Maclaren.... 534 

Ditto T. Pryor 668 

Ditto, I.. II T. A. Rickard 232.261 

Ditto F. Lynwood Garrison.... 377 

Ditto M. W. von Bernewitz. . . . 377 

Ditto C. F. Tolman, Jr.... 311 

At Creede, Colorado 355 

Discussed on the Rand 739 

Perth. Amboy 120 

Peru, mining in 820 

Mining laws of 793 

New ChuriUitamho gold mines 49 

Silver in 68 

Peruvian civil code 514 

Mining regulations 312 

Pests in mining districts of the world 389 

Peters. Edward D 1 1 ydrometallurgy of copper.... 602 

Ditto On copper smelting. . . . 592 

Petrography of rocks at National 656 

Petroleum Editorial.... 139 

In Chile 728 

Exports. California 109 

Fields. Illinois Editorial 1 

In Siam 523 

Use of in Chile 325 

Pettis. E. S. Zinc dust precipitation.... 151 

Phalen, W. C. .Prospecting for bauxite aluminum ore. . . . 305 
Ditto Prospecting for chromium ore.... 400 



MINING AND SCIENTIFIC PRESS 



Vol. 105 



MINING AND SCIENTIFIC PRESS 



15 



Page. 

Phelps, Dodge & Co 60, 250, 282, 313, 804 

Ditto Editorial 197 

In New Mexico 183 

Mines 477 

Mines, August output 360 

Mines production in July 220 

Philippine Islands mining 191 

Philippines, gold mining in 462 

Manganese in the 376 

Phoenix Mining, Smelting & Development Co 28 

Phosphate rock, manufacture into fertilizer 814 

Phosphorus in copper and tin alloys 714 

Phthisis on the Rand 835 

Picket, H. E., death of 484 

Pierce type of converter 553 

Pig iron imports into Prance 465 

Production at Trollhattan, electric 54 

Pillsbury, A. J Mine-owners' liability for 

accidents 56 

Ditto Mutual liability insurance for mine- 
owners 20 

Pioneer cut at Panama 818 

Pioneer Company of Siberia, Ltd 

C. W. Purington.... 140 

Pioneer Smelting Co 131 

Pioneer Tin Co. output 642 

Pioneering in the tropics C. M. Eye.... 370 

Pittsburg smoke investigation Editorial.... 38 

Pittsburg-Salt Lake Oil Co 59 

Pittsburg-Silver Peak half-yearly report 640 

Placer gold, dry concentration of.... P. J. H. Merrill.... 50 

Mining at Dawson 744 

Mining in Bonnifield district of Alaska 736 

Placers of Arizona, drv washings of value, gold 

T. Lane Carter. ... 166 

Placing shaft sets Tom McCormac... 405 

Ditto Old Miner. ... 536 

Plant at Butte & Superior mine 809 

Pennsylvania Smelting Co 

S. L. Goodale and H. ('. Ray 104 

Plate-house at Consolidated Langlaagte 291 

Platinum deposits 486 

Deposits in Mongolia 

St. Petersburg correspondence.... 597 

Determination of small amounts of..F. P. Dewey.... 87 

Exports from Russia 634 

In United States in 1911 325 

Market in Russia 621 

Prices in Russia... St. Petersburg correspondence.... 387 

Uses of 486 

Plumed Knight mine, Saurer truck at . H. T. McDonald.... 131 

Plymouth mine 459 

Shaft, unwatering the 504 

Pneumatic stamps at Colcoath mine 379 

Poderosa copper mine 91 

Poisoning, industrial lead James O. Clifford.... 9 

Politics and business Editorial.... 164 

Pollard, W., death of 257 

Porco Tin Mines Co. of Bolivia 538 

Porcupine mines production Editorial.... 815 



Portable suction rose 601 

Portage Lake water traffic 640 

Portugal, wolframite in K. Branckart. . . . 758 

Positive, probable, and possible ore reserves 492 

Possibilities of the Mother Lode in depth 

W. H. Storms. . . . 459 

Postofnec regulations Editorial.... 455 

Potash 127 

Deposits, cause of formation in Nevada 502 

Deposits laws 780 

Deposits, laws governing location 582 

Discovery in Nebraska 747 

Explorations in Nevada 827 

Fields, Railroad Valley G. L. Sheldon.... 502 

Potassium permanganate, used In cyanide work 226 

Powder smoke from face of adit, clearing 160 

Power at Brazilian tin mines 805 

At the Alaska Treadwell mine 211 

At the Waihi mine M. W. von Bernewitz. . . . 591 

At Tonopah 761 

Companies in Montana 809 

Consumption of tube-mills 847 

Costs at Cananea 567 

In Nicaragua « 722 

Merger in Utah, Colorado, and Idaho 
Plant at the Swansea Smelter 



776 

800 

Plant of Great Palls Co 554 



Plant, Scottish Gympie, now 

Utilization of Editorial.., 

Ditto R. B. Symington.. 

Pre-Cambrian rocks Editorial.. 

Precipitate, experiments on tine 

Smelting and refining zinc-box ... .H. R. Edmands... 



S00 
584 
66S 
139 
55 
55 



Precipitation at Tonopah 829 

Of copper from mine water 364 

Of copper from mine water at Butte 404 

Of gold and silver by carbon R. K. Cowles.... 730 

Precision, measure of F. P. Rolfe.... 474 

Precious metal veins, outcrops of F. H. Morley.... 368 

Premier Diamond Company 243 

Preparation of metallic tungsten 632 

Presidential election Editorial.... 5S4 

Prestea Block A mine 300 

Pretoria diamond fields 503 

Price, Thomas, death of 546 

Prices and surplus, copper Editorial.... 72 

Prince Consolidated Mining & Smelting Co 91 

Mine 776 

Output 676 

Printing in China 456 

Problems of fines Editorial.... 425 

In wet treatment of copper ores 361 

Smoke Editorial.... 38 

Producer-gas, chemistry of 549 

Production and allied statistics, California oilfields.... 

J. H. G. Wolf 402 

And consumption of copper in United States 161 

Of barvtes in United States in 1911 145 

Of Black Hills, South Dakota 737 

Of gold in British Guiana 144 

Of manganese ores in 1911 53 

Of Queensland gold 85 

Profit on coinage by Government of United States.... 374 

Profits, what are mining? I. R. Finlay.... 441 

Ditto Charles Janin.... 570 

Ditto Ernest V. Orford.... 887 



Page. 

In lead smelting L. L. Whittich . . . . r>0:; 

Progress in Institute Affairs Editorial.... 553 

In the Joplin district 59s 

Progress mine -, 117 

Prospecting drill, light R. Y. Hanlon . . . . 17 

For bauxite aluminum ore W. C. Phalen . . . . 30F, 

For chromium ore W. C. Phalen.... 400 

For vanadium F. L. Hess.... 366 

In Nicaragua W. A. Connelly.... 373 

In Tasmania Launceston correspondence.... 569 

In the Yukon 341 

Provincial Bureau of Mines 28 

Pryor, T Persistence of ore in depth.... 6«s 

Public lands and the States Editorial.... 7ST, 

Free use of timber from H. W. MacFarren . . . . 89 

Publicity and the Mining Congress Editorial. . . . 651 

And the press 472 

Ditto T. A. Rickard... 361 

Of mining affairs 424 

Puebla S. & R. Co. listed on Exchange r.3 7 

Pulley made for the Aanconda Co., by the Dodge Manu- 
facturing Co., Mishawaka, Indiana 422 

Pulp elevating at Bendigo 201 

Elevating at Broken Hill 201 

Elevating at Kalgoorlie 201 

Elevating at Waihi 201 

Elevating on the Rand 201 

Iron in mill A. McA. Johnston ... 463 

Pump starter, automatic 667 

Pumping association 128 

Pumping by siphon at Galena, Kansas 738 

Pumps at Cripple Creek 742 

At the Free Silver shaft. Aspen 302 

For handling water from copper mines at Butte.... 404 

Purington, C. W Handling gravel in Siberia.... 212 

Pioneer Company of Siberia. Ltd 140 

Pyritic ore, cyanidation of F. B. Reece . . . . 77 

Pyrometer, description of Sieman's 557 



Quartette Mining Co 

Quartz, occurrence and uses of 

Production in U. S. in 1911 

Quebec in 1911, mining in 

Production of province in 1911 

Queensland gold production 

Gold yield of 

Mineral land law 

Mineral production and mining laws 

Quicksilver 

District of Terlingua, Texas 

In the Urals St. Petersburg correspondence-. 

Lost in milling 

Los in mills 

Output of California. 1912 

Uses 

Quilp Gold Mining Co. suit 

Quincy output 



27 
358 
302 
234 
224 
563 
325 
440 
3 87 
100 
772 
1 17 



R. R. R. mine of Arizona 

Rabbles in Wedge furnace 

Railroad mineral lands 

Ditto Editorial .... 

Ditto J. F. Farraher.... 

Railroad Valley potash fields G. L. Sheldon. . . . 

Railroads of Australia 

State owned Editorial .... 

Railroad Valley Co 64, 

Railroad Valley Saline Co 

Rails, copper in steel 

Rand, average yield per ton 

Consolidation's 

Death rate due to accidents and disease 

Gold production 

Mines, stores used in 1911 

Affairs generally 

Rand, Mines' trial committee of the 

Near Denver, new Editorial.... 

Output 

Water supply of 

Rand Klipfontein Gold Mining Co 

Rand Mines, Ltd fohannesburg correspondence ... . 

Randfontein output, 

Ransome F. L 

Ditto Genesis of the lead-silver ores of 

Wardner district, Idaho 

Rare metals, researches upon 

Rates on Utah coal Interstate-commerce commis- 
sion decision re freight 

Raub Australian Gold M. Co 

Rawlev Mining Co. tunnel completed 

Ray, H. C. and S. L. Goodale Pennsylvania 

Smelting Company plant 

Ray Consolidated Copper Co 

Development ■■■ 

Mine 155. 

Output 

Report ■ ■'■ 

Raymond, R. W 135, 

Reactions of iron with cyanide solution 

Read, Thomas T Compressed-air hoisting at 

Butte 

Ditto Hydrometallurgy of copper.... 

Ditto Impression's of the Comstock.... 

Ditto Mason Valley copper smelter.... 

Ditto Nevada Douglas mines ... 

Reaction with cyanide and copper ores 

Ready Bullion mine 

Mill of the Alaska United 

Real del Monte y Pachuea Co 

Research in the Mining School 

Raymond C. Benner. . . . 

Recent advances in Industrial Chemistry 

Raymond C. Benner.... 

Reclaiming dredged land J. H. Leggett.... 

Record breaking output of copper 

Zinc production 

Recording gauge for filter operation 

Staff correspondence. . . . 
Red Cliff Mining Co., Ltd 65, 

Mine 

Redjang Lebong mine output 



69 
Til 
640 



4 44 

831 
247 
102 
34 6 
502 
146 
683 

1 72 
64 

248 
770 
21 

2 38 
728 

2 7:. 

176 
.-,01 
1 

.-,14 



121 
112 
604 
344 



113 
629 



59 
8311 
60S 



104 

1 85 



24S 
71 " 

362 
163 



55 r 
602 
24 4 
267 
20 6 
204 
69 
35 
42 



1S2 
629 



556 
569 



766 

97 
129 

387 



L6 MINING AND SCIENTIFIC PRESS 



Page. 



Redrup's mine, in Rhodesia "66 

Reducing conveyor belt costs 628 

Reducers in assaying, power 748 

Reece, F B Cyanidation of pyritic ore.... 77 

Refinery at San Francisco mint.' "95 

Evolution of an Elect rolytic, 1. 11 

Harold French 754, 791 

Refining, zinc-box precipitate smelting and 

H. R. Edmands. ... 55 
Regeneration of cyanide solution .. \V. I). Williamson.... 19 

Regulations re industry. European government*! 10 

Relatives of mine officials, employment of 681 

Reno Smelting & Refining Co.. Nevada 676 

Report of the Committee of Five 106 

Of the International committee on atomic weights. . . . 692 

Reports issued by mining companies Editorial. . . . 230 

Mining C. S. Herzig. . . . 20 

Republic districts, Washington, mines of 235 

Republic Mines Company suit 711 

Rescue work at mines 533 

Research and colleges Editorial. ... 2 

Residue disposal 258 

Results from hot solutions at Tonopah 828 

Retallack & Co 93 

Re-treatment plant at Kuk San Dung. Korea 652 

Reverheratory copper-smelting furnace, development of 

E. P. Mathewson 592 

Furnaces at Swansea plant 799 

Rfutlinger, R. R Filter patent litigation.... 801 

Revison of the mineral land laws 685 

Rhodes Hall mine at Fairbanks 806 

Rhodesia, Need of geological survey 779 

Mineral output for June 381 

Rhodonite in California, massive, finely granular 54 

Mineral output 540 

Mining progress in.... South African correspondence 729 

Rhodesia Cold Mining & Investment Co 68 

Rhodesia-Katanga Railway & Mineral Co 186 

Rhodeslan gold output 445 

Native labor bureau 57 

Rhyloite at National. Nevada 655 

Rice. E. R. .. .Construction of triangulation stations.... 661 

Richards. Arthur, work on tin treatment 528 

Rickard, T. A Mountain of gold 89 

Ditto Newspaper. ... 457 

Ditto On ore deposition.... 534 

Ditto Persistence of ore in depth. I. II.... 232. 261 

Ditto Publicity and the press.... 361 

RtckettS, L. D Work on the Cananea 

Copper company 565 

Rico-Wellington mill 416 

Ridgway filters in Western Australia 806 

Riffle tables and launders 35 

Rights of the oil men Editorial . . . . 101 

Rio Antigua Mining Co 62 

Rio Plata M. Co. output 816. SI.". 

Rivetless chain, simplex ....Cross Engineering Co 132 

Roasted ore, testing 300 

Roasting at Manhattan 744 

At the Golden Reward, South Dakota 737 

Concentrate 325 

Furnaces at Calumet & Arizona smelter 530 

Furnaces at Ontario mill 811 

In wedge furnace 831 

In wet processes for copper 602 

Plant at Golden Reward mill 705 

Roberts, G. M 292 

Robinson mine 671 

Rochester Canyon district. Nevada 810, 841 

Rock crushers at Kalgoorlie 

M. W. von Bernewitz . . . . 469 

Rock drill wear and tear 716 

Drills on the Transvaal 340 

Rocky Mountain coal production 7 

Rodgers, M. K 133 

Rogers. A. P 133 

Rogers Spring M. & S. Co 61 

Roebling Sons Co. wire mill at Houghton 385 

Rolfe. F. Percy The measure of precision.... 474 

Rolls at Ohio copper mill 738. "44 

Ditto Editorial 717 

Edison giant crushing I. F. Springer.... 276 

Grooving of crushing 258 

Method of feeding 421 

Rondon & Co.. I.., of Seoul 84 

Roofing union stock yards at Memphis. Tenn 

H. W. Johns-Manville Co. of New York.... 422 

Rooiberg Minerals Development Co.. Ltd 

Company reports.... 645 

Rooiberg tin mine 572 

Roosevelt drainage tunnel 318. 511 

Roosevelt, Theodore, attempted assassination of 

Editorial 488 

Ropes, shaft-driving 226 

In hoisting 847 

Roaarla Cyanide plant A. L. Sweetser. . . . 752 

Roseherry law 56 

Rosenblatt. Girard B Large synchronous motors 

for compressor service 723 

Ross. <;. McM Foreign trade and Panama canal.... 

tolls 378 

Rossland, British Columbia. South Belt at 

C. A. Stewart 107 

Rossler on ore deposits 430 

Rothwi 11. R. P 232, 362 

Roxana, G. M. Co 63 

Roval Consolidated mine costs 521 

Royal Flush mill 742 

Rubies and ruby mining 310 

Ruby district of Alaska output 575 

Output of Burma ' 827 

Placer district of Alaska 485 

Rubv Mines Co.. production 827 

Rush. U. S Alaska Problems 181 

Russia gold mining companies 8 

Rutile in United States 659 

Ryan. John D. Copper interests.... 650 



s 

Safety device for skips in inclined shafts 631 

Electrical factor of 116 

Saline Valley Salt Co.. works at 774 

Salmon-Rear River Mining Co 65 

SalZblirg Alps, emerald mines in the 56 

Samples of gas from an oil well 100 



Vol. 10.") 



Page. 

Sampling at Mason Valley smelter 267 

Battery pulp ' 258 

Gold bullion 714 

Ore Editorial 230 

Ores in mills 847 

Plant at Great Cobar mine 234 

Sampson, Roswell E., death of 814 

Samuel Montagu & Co 115 

Sand in concrete work 533 

Leaching 258 

Treatment at Empire mine 587 

Used for glass making 628 

Sands, investigation of Feather River, black 

Edwin A. Sperry.... 624 

Of Trinity county, California, black 608 

San Francisco and the International Engineering Con- 
gress Editorial 329 

Jardine concentrator made in 51 

Mint business 751 

San Juan county mines, report on 384 

San Nicolas mine 29 

San Poi Con. M. Co 28 

San Vidal y Anexas Co 483 

Santa Gertrudis Co., Ltd Company report.... Sit 

Ditto Annual report.... 704 

Santa Romana shaft, cost of Bennett R. Bates.... 179 

Sapphire output of Burma 827 

Production of Montana 743 

Saurer truck at Plumed Knight mine 

H. T. McDonald 131 

Saving time in the laboratory Harold French.... 208 

Sayapullo Mining Co 436 

School of Mines at Golden, Colorado 750 

At Moscow, Idaho 775 

In Kansas Editorial.... 455 

Scottish Gympie annual report 642 

New powtr plant S«0 

Scottish Ontario 93 

Scott. Walter (Death Valley Scotty) 393 

Screen analysis, comparative method of... A. T. Tye.... 

Dry method 310 

t Semi-dry method 339 

Wet method 339 

Screens, standard for grading analyses ... H. Stadler.... 501 

Secondary alteration in mines 191 

Enrichment at Creede, Colorado ::.!t 

Self-tilling measuring bottle O. C. Smith.... 830 

Senate resolutions re American harbors .... Editorial ... . 197 

Seoul Mining Co 83 

Separation of base metals In cyanide solutions for Quan- 
titative determination 

P. L. Guppv and Douglas Waterman.... r. :» 7 

September copper review Misha E. Appelbaum . . . . 504 

Seven Troughs Coalition Mines Co 127 

Mine 810 

Seward peninsula gold and tin production 115 

Gobi dredging on the Charles Janiu.... 394 

Shaft lining, concrete F. E. Calkins.... 56* 

Sets, framing Tom McCormac... 116 

Sets, placing An old miner.... 536 

Ditto Tom McCormac.... 405 

Sinking at Buckeye-Belmont mine 811 

Sinking by 'raising' 637. 640 

Sinking, churn-drilling in Tom McCormac.... 45 

Sinking reversed 211 

Shafts on Mother Lode. California S39 

Steel sets in inclined W. L. Brown. . . . 396 

Shamva mine of Rhodesia 445 

Work 382 

Shannon Copper Co 125, 21* 

Ditto •. Company report.... 79*> 

Mine development 541 

Production 531. 773 

Report 741 

Sharwood, W. J. and Allen J. Clark Amalgama- 
tion at the Homestake 762 

Sharwood, W. J Words and their use.... 118 

Shasta County Farmers' Protective Association 808 

Shattuck-Arizona Co 706 

Dividend 830 

Production 530 

Sheba gold mine 637 

Sheldon. G. L Mexican conditions.... 668 

Ditto Railroad Valley potasli fields.... 502 

Sherman anti-trust act Editorial.... 38 

Shook , 35 

Shooting off the solid in coal mines 582 

Short-circuiting in anode tanks A. R. Ledoux.... 52 

Short zinc experiments on 55 

Shoveling contest at Wardner, Idaho 742 

Contests 291 

Shumway concentrator made in Los Angeles 50 

Siberia, handling gravel in 212 

Siberian mining investigations 441 

Sicilian sulphur industry Arthur Gam-Is.... 365 

Siebenthal. C. E Report on midyear spelter sta- 
tistics. 1912 H9 

Sierra Nevada development 577 

Mine, new orebody 54 1 

Sierras, Bonanza belt east of the H. C. Cutter. . . . 833 

Sieve tests on Lane mill product 556 

Silesia, ore production of 68K 

Silica fusing 280 

Required for converter slag B61 

Silver absorbing oxygen 748 

In anodes for Wohlwlll process 796 

In Peru 68 

Market 115 

Mining at Cobalt. Ontario Reginald E. Hore.... 74 

Occurrence of hair 780 

Ore treatment 767 

Output of California. 1912 800 

Production in Montana. 1911 180 

Reduction from acid treatment of bullion 766 

Silver King Coalition Mines Co 21. 128. 683 

Ditto Company reports.... 32 

Silver Peak marsh in Nevada 827 

Silverman Syndicate mines 156 

Silverton. Colorado, new custom mill Editorial.... 681 

Silverton Mines, Ltd 93 

Simmer & Jack Prop., Ltd Annual report.... 613 

End of the 731 

Simplex rivetless chain Cross Engineering Co.... 132 

Situation in the state of Chihuahua 174 

Sketch of the geology of Ecuador W. A. Wolf.... 110 

Skidoo Mines Co 156, 416. 575, 741 

Skips in inclined shafts, safety device for 631 

Slags, alumina H. C. Bellinger.... 111 



Vol. 105 



MINING AND SCIENTIFIC PRESS 



17 



Page. 

Slate Creek in Alaska, gold deposits of 338 

Slides at Culebra cut 726 

Slime agitator step-bearing L. C. Trent.... 505 

Slime at El Tigre 727 

Decanting of Editorial.... 751 

Pond at El Tigre 727 

Treatment, decanting rich solutions 847 

Sludge channels in New Zealand 258 

Small amounts of platinum determination 

F. P. Dewy. . . .87 

Smelter at Calumet and Arizona 807 

At Great Cobar 234 

At Swansea Co. . . . 799 

Capacity on zinc ores 149 

Fume control Editorial.... 518 

Fume in California 808 

Ditto Editorial 783 

Fume in Chile Editorial.... 749 

Fume reactions 524 

Gases, neutralization of George C. Westby. . . . 524 

Mason Valley Copper Thomas T. Read.... 267 

Work at Thompson, Nevada 710 

Smelting Editorial.... 329 

And refining zinc-box precipitate .. H. R. Kdmands. . . . 55 

At Kyshtim, Russia •. 595 

At Shannon mine 799 

Costs at Cananea 567 

In Wales in 1765 592 

Practice in Japan 364 

Precipitate at Empire mine 588 

Sulphides in blast-furnace, theory of 559 

Smith, Cecil Brunswick, death of 29 

Smith, H. G Operating a stationary filter.... 501 

Smith, George Otis Summary of the work of the 

U. S. Geological Survey 519 

Smith, O. C A self-filling measuring bottle.... 830 

Smoke problems Editorial.... 38 

Smokev Development Co 97 

Snelling, W. 134 

Snow at Lucre, Bolivia 389 

Snowsllde in Alaska, at Copper Mountain 839 

Snowstorm Mining Co. 26 

Sociedad Explotadora do Calyloma Consolidated 68 

Society of mining accountants Editorial.... 101 

Sodium peroxide, estimation of H. L. Easton.... 87 

Solution, action of mineral sulphates and arsenates on 

cyanide Andrew F. Crosse.... 16 

of gold in cyanide, action of oxidizing agents on the 

velocity 500 

Regeneration of cyanide W. D. Williamson.... 49 

Soot, damage by 258 

Gold and M. W. von Berne wltz ... . 119 

Source of iron in mills 463 

Sources of wealth in low-grade ore deposits 453 

South African mines, new concentration at 68 

Mining 703 

Mining conditions Editorial.... 2 

Mining Journal, abstract from 11 

South American mining affairs Editorial.... 6 10 

Copper Syndicate report 547 

South American Development Co Editorial.... 102 

South Belt at Rossland, B. C. C. A. Stewart .. 107 

South Dakota metal production 88 

South Live Oak Development Co 60, 125 

South Utah mines and smelters 120 

Report 744 

Southern Oregon and Northern California Mining Congress 126 

Ditto Editorial.... 102 

Southern Pacific Railroad Company 805 

Ditto Editorial. . . . 102 

Decision in Supreme Court 771 

Southern Rhodesia gold output 57 

Tinstone in 58 

Southwestern Miami mine 606 

Souvenir medal 703 

Spain, mines in southern E. J. Norton.... 375 

Spanish mine costs 520 

Specific gravity chart G. B. McLain.... 150 

Spelter statistics 135 

Statistics, mid-year, 1912 C. E. Slebenthal . . . . 149 

Spencer. W. H., death of 160 

Sperry, Edwin A Investigation of Feather Rivet- 
black sands '. 624 

Spilsbury, P. G Work of the Aguacate mines .... 404 

Spitzbergen coal and marble deposits 389 

Spokane, tungsten mines near 178 

Springer, J. F Edison Giant crushing rolls.... 276 

Spurr, J. E 301 

St. Ives Consolidated Mines. Ltd 57 

St. John del Rey , 122 

Half year's output 842 

St. Joseph Lead Co. power plant 809 

Stacking hydraulic tailing W. W. Edwards.... 243 

Stadler, H ..Experiments with the agitator.... 599 

Ditto New metallurgy.... 78 

Ditto Standard screens for grading analyses.... 501 

Stage crushing with rock-crushers 470 

Stahl on ore deposits 430 

Stamp duty at Rosario mill 752 

Duty of Rand mills 335 

Feeders at Tonopah 828 

Mills at Bendigo 200 

Mills at Fairbanks 638. 639, 773, S06 

Mills in Michigan ' 769 

Mills in Nicaragua 720 

Practice at Tonopah 828 

Stamps and pans, and Huntington mills at Kalgoorlie 

Editorial .... 616 

At Homestake mills 847 

At Rosario mill, heavy 752 

Tn the Transvaal 277 

Versus Huntington mills ; 620 

Standard screens for grading analyses .... H. Stadler.... 501 

Standard Consolidated mine at Bodie, report on 209 

Standard Silver Lead M. Co 93, 97 

Stannate of sodium for fire-proofing cotton goods 630 

Stansbie, J. H Electrolysis of nitric acid solu- 
tions of copper 800 

Stassano electric furnace 309 

Stations, construction of triangulation . . E! R Rice 661 

Steam hoist 'at Butte 554 

Power costs at Waihi 591 

Shovel work at Panama 818 

Steel alloys 629 

Effect of copper on Kirby Thomas.... 474 

First makes in United States 421 

High-speed tool 814 

Production by electric furnace in America and Europe 582 



Page. 

Sets in inclined shafts W. L. Brown.... 296 

Steele, Sutton & Steele of Dallas, Texas 50 

Step-bearing for slime agitator L. C. Trent. . . . 50.". 

Ditto Douglas Waterman.... 375 

Steptoe, furnace work at 592 

Stevens, Blarney Measure of precision.... 733 

Stewart. C. A South belt at Rossland. British 

Columbia 107 

Stewart Mining Co 90, 284, 287, 347. 353, 379, till 

Stewart mine output 743 

Sticking to the job •Cilmineer' . . . . 733 

Ditto Joven... . 505 

Ditto S. F. S 733 

Ditto Sonorense . . . . 602 

Stone, G. C Amendments to constitution of 

A. I. M. E., proposed by 496 

Stonehouse, J. W., of Colorado Enameled steol sig- 
nal signs for mines 486 

Stope filling, cost of 847 

Stopes, sand-filling of 258 

Stoping archers under levels 792 

Bv 'rill' svstem 325 

Methods at Waihi 789 

Shrinkage method at Waihi i91 

With square sets, and tilling 790 

Storms. William H California State Mining 

Bureau 821 

Ditto High Grade district . . . . 273 

Ditto Mining at Cripple Creek.... It 

Ditto Possibilities of Mother Lode in depth.... I.",!i 

Ditto Report on mineral industry of Cali- 
fornia soo 

Dittl Work at Mining Bureau.... 81i 

Stratton's Independence Annual report.... 640 

Case Editorial 328, 487 

Mine 157 

Results Editorial.... 615 

Straub 14-stamp mill at Blrchvllle mine 774 

Stream flow in California 632 

Strike at Greene Cananea mines ■ 843 

At Porcupine 111. 777 

Ended at Bingham and Elv Editorial.... 552 

Of miners at Bingham Editorial.... 39'! 

Of miners at Ely Editorial 423 

Suction gas power at small mines at Kalgoorlie 61 S 

Rose, portable 601 

Sudburv nickel district, Ontario, Canada 

Kirby Thomas. . . . 433 

Sulitjelma mine • ■ • ■ 256 

Copper mines output 569. S:,l 

Sulphates and arsenates on cyanide solutions, action of 

mineral sulphates . ... r. ... . Andrew F. Crosse.... 16 

Of ammonia produced from atmosphere 50:> 

Ore assays 468 

Sulphides in roasted ore jjjjfl 

Sulphur and copper in cyanide solution 20._. 

Deposits in Wyoming 145 

Dioxide from fume 524 

Dioxide from converters 558 

In Colorado \\\ 

Tn Utah 149 

Production in Sicily 421 

I'sed in paper-pulp manufacture 681 

Sulphuric acid production l sfi 

Sundry civil bill Editorial.... 71 

Sunheat. employment of 516 

Sunny Brook. Joplin ore. treatment at 508 

Superior & Boston mine 125, 571 

Superior & Pittsburg output : '29 

Supplies at Transvaal mine Francis Drake.... lis 

Surigao G. M. Co • "69 

Surplus, copper prices and Editorial.... i_ 

Survey and its work Editorial 51S 

Stations, construction of 661 

Swansea Con. G. & S. M. Co 62. 450. SO, 

Smelter 9*. J?9 

Swastika district 1»» 

Swastika Mining Co 

Swedish Lapland J- 

Sweetser. A. L Rosario cyanide plant.... (52 

Switch-boards for small mining plants 35 

Symington. R. B Utilization of power.... 668 

Symmes. Whitman 256 



Syria, mining in 



4 63 



Table mountain. Tuolumne Augustus Locke.... 85 

Tacoma Smelting Co 28 

Smelter '. ." gg 

Tailing and dumps S| 

Covering agricultural land above Sacramento 20._. 

Disposal of El Tigre. Sonora ....Donald F. Irvin.... 72i_ 

Stacking hydraulic 24j. 

Treatment at Ophir mine '03 

Taking care of the workman Editorial.... 616 

Tamarack & Custer Con. M. Co 96 

Mine 233 

Tamping drill holes Editorial.... 134 

Tanganyika affairs 382 

Concessions 24, 186 

Tanks, short-circuiting in anode A. R. Ledoux.... 52 

Tantalum in United States 659 

Research on 62. • 

Tasmanian mineral output 596 

Mining companies' amalgamation 44i> 

Prospecting in Launceston correspondence.... 569 

Taylor Iron & Steel Co. acquires another firm 682 

Taylor & Sons. John ■ 508 

Indian mines 572 

Tax schedule, Arizona 61 

Taxes in Arizona Editorial.... 816 

Tayeh silver mines of China 387 

Technow, Walter, describes Ophir cyanide plant 703 

Telescoping burner, convenient ....Fritz Friedrichs . . . . 667 

Produced bv oxidation of sulphides 557 

Suit 709 

Telluride Power Co 412 

Temperature in gasoline engine cylinder 748 

Temperatures in Comstock mines 244 

In Rand mines "35 

Tempering copper and bronze S30 

Tengo Mining Co.. Philippine Islands 568 

Tennessee iron industry 500 

Tennessee Copper Co 24. 90. 482 



1 8 



MINING AND SCIENTIFIC PRESS 



Vol. 103 



Page. 

Terry Lumber Co 95 

Texas asbestos propel lies near Llano 11 

Production of metals in 1911 270 

Thane. B. L. 262 

Thaw-houses and magazines for explosives 214 

Theories of ore deposition prior to the seventeenth cen- 
tury H. C. and L. H. Hoover.... 426 

Thlbault gold amalgamator 848 

Thomas, Kirby C'uyuna iron range.... 52 

Ditto Effect of copper on steel.... 474 

Ditto Sudbury nickel district, Ontario, 

Canada 433 

Thompson, Arthur Katalla Alaska oilfield.... 169 

Thompson smelter, Nevada 177 

Thorn, J. F. . .Goldfield Consolidated report for July.... 307 

Three R mine of Arizona 444 

Thum process of silver refining 769 

Thury system of electric hoisting 490 

Tightner mine output 840 

Tigre Mining Co , 98, 451 

Timber and fuel in Nicaragua 722 

From public lands, free use of. . .H. W. MacFarren. ... 89 

In mine replaced by concrete 609 

Scarcity in various countries Editorial.... 552 

Timbering at the Colorado mine 564 

In levels of Waihi mine 789 

On the Mother Lode mines 403 

Times of Ixmdon 457 

Timiskaming mine 17, 76 

Tin assay by vanishing shovel 489 

At Grant's Pass II. M. Parks 181 

Discovery in China 792 

Extraction from Ores Edward Walker.... 528 

In Bolivia 538 

In Bolivia in 1911 53 

In northern Transvaal i... 604 

In Rhodesia 753 

In Siam 569 

Market 1.. Vogelstein & Co.... 645 

Ores in bronze manufacture 830 

Output of Aramayo Francke mines 804 

Production, American 49 

Production of Nigeria 49 

Production of Seward Peninsula, gold anil 115 

Recovery from scrap 630 

Shipments and prices in July 182 

Tinstone in Southern Rhodesia 58 

Tintic standard 65 

Tirril regulator for constant voltage 435 

Toggle for rock-crushers 469 

Tolima Mining Co. of Colombia Company report.... 805 

Tolman, Jr., C. F Persistence of ore in depth.... 311 

Tolovana mine at Fairbanks 252 

Tom Reed mine 94 

Tomboy. G. M. Co., Ltd Companv report.... 779 

Tomboy mill 820 

Mine 449 

Output 513, 591, 808 

Tombstone Consolidated mines 607 

Tonopah district, mining progress in 155 

Metallurgy at M. W. von Bemewitl . . . . 828 

Tonopah & GnldhVld Railroad Co 512 

Tonopah-Belmont Development Co 100. 127, 158 

And lilter suits 650 

Mine 577 

Ditto O. H. Johnston 247 

Output 543, 841 

Tonopah Extension mine 354 

Shaft 27 

Tonopah Mines Corporation buying claims 711 

Tonopah Mining Co 17. 127, 543. 841 

Output 255, 676 

Tonopah Merger Hilling Co 27, 121 

Tooele, furnace work at 592 

Training of mine employe s .... M. W. von Heme witz . . . . 336 

Miners Editorial .... 328 

Transportation in Nicaragua 722 

Transvaal Government and the mines 251 

Mine supplies Francis Drake.... 176 

Miners' Phthisis Sanatorium 245 

Mining in the, in 1911 246 

Mines, production 458 

Output for July 256 

Transvaal Coal Trust Co.. Ltd 32, 68 

Transvaal G. M. Estates. Ltd Companv reports.... 679 

Travillion. C E Electrolytic determina- 
tion of copper 830 

Treadwell mills, breaking of rams at 258 

Treating sulphides in the Bessemer converter 

John Holloway.... 557 

Treatment at Black Oak mine 687 

At Chontales. Nicaragua 722 

At Colorado School of Mines' plant 750 

At Empire mine 586 

At North Washington Power & Reduction Co 236 

At Rosario plant, Honduras 752 

At the Tsudo mill. Japan 239 

Of flue-dust at Mason Valley smelter 270 

Of low-grade dumps in California 416 

Of low-grade ore at Kalgoorlie 666 

Of Mysore ore 637 

Of ore at Benguet, Philippine Islands 787 

Ore at Major mines 628 

Oxidized ore at Kalgoorlie 618 

Plants in Western Australia, two new 

M. W. von Bornewitz 148 

Problem A. W. Geiger.... 767 

Ditto Henry Vogel 634 

Tregonh-g. C. D Improved grinding pan.... 156 

Trent. L. C Step-hearing for slime agitator .... 505 

Trenton Iron -Works 91 

Trethewey Silver Cobalt Mine, Ltd 59 

Tri-Bullion S. & D. Co 120 

Trinity Copper Co 506 

Trinity Dredging Co.. new dredge 576 

Trinity G. M. & R. mine costs 522 

Troitsk Goldflelds Co Company reports.... JIT 

Trollhattan. electric pig iron production at 51 

Smelting iron ores at 309 

Tropics, pioneering in tie C. M. Bye.... 370 

Truck at Plumed Knight mine Saurer 

H. T. McDonald. ... 1 :i 1 

Truckee River Electric Co 128 

Tube-mill a; a coarse-crushing device 616 

At Black Oak mill 687 

Gear 226 

At Copper Range Consolidated mills 353 



Page. 

At Tonopah 828 

First used at Moulton mill 35 

In the Transvaal 277, t;m 

In separate houses 2 2* 

Tularosa, New Mexico, bismuth ore 142 

Tungsten 500 

Mines near Spokane 178 

Preparation of metallic 632 

Research on gff 

Tungsten Con. Mines Co , , 23 

Tuolumne Copper Mining Co 27, 183, 444 

Tuolumne Table mountain Augustus Locke.... 85 

Turbo blower plant at Mt. Morgan 500 

Generator at Baltic mill 353 

Turkestan, gold and copper in 422 

Turkey, mineral deposits in 45 

Mining in 640 

Twin Star Mining Co 63 

Tye, A. T. ...Comparative method of screen analysis.... 339 
Tyee Smelting Co 351 



Union Consolidated meeting 

Union Construction Co. 

Union Government of South Africa, revenue from mines 

Union Iron Works 94, 

Unique scheme of elevation C. S. Haley.... 

United Copper Co 

Mine 

United Engineering building Editorial.... 

United Greenwater Copper Co 

United Shoe Machinery Co Editorial.... 

United States commerce in August Editorial.... 

Mint coinage 

Oil exports Editorial.... 

Presidential election Editorial.... 

United States Bureau of Mines Editorial. . . .71. 

■ Appropriations 

United States Geological Survey appropriations for 

At High Grade Editorial 

Reports 

Statistics of Colorado 

Topographic maps 

Use of name 

United States Steel Corporation Editorial.... 

Employees Editorial 

United States Motors Co. collapse 

United States Smelling. Refining &• Milling Co.. 17, 22, 

59 191 

Ditto Editorial....' 

United Verde Copper Co 

United Verde Extension Mining C 60. 

Ditto Editorial 

Universities and Mining Schools 

University of Minnesota Editorial.... 

Unwatoring the Plymouth shaft 

Urals, mining in the.. St. Petersburg correspondence.... 

Quicksilver in the St. Petersburg correspond- 
ence 

Uranium in the United States 

Uren, Samuel, death of 

Urquhart. Charles H The Black Oak mill ... 

Uruguay gold mines 

Mining In 

Use of feldspar 

Of sand 

Of timber from public lands, free 

If. W. MacFarren.... 

tlses of quicksilver 

Utah coal. Interstate Commerce Commission re freight 
rates on 

Copper production in 1911 

Sulphur deposits In 

Zinc production in 1911 

Utah-Apex Mining Co 

Production for vear 

Utah Consolidated Mining Co 90. 12X. 

Utah Copper Co 128, 155. 185. 216. 73S. 

Dividend 

Quarterly report 259. 

Utah Ore Sampling Co 28. 

Utica Mining Co 

Mine costs 

Utilization of atmospheric nitrogen 

Of power Editorial . . 

Dittr , R. B. Symington. .. . 

I'topia M. & M. Co. of Wyoming 



Vacuum filter patents 

Valuation of mines Alexander McLaren.... 

Value of Geological Survev property 785, 

Of ore on the Rand 739, 

Of the Spanish arroha Robert Fraser, Jr.... 

Van Hlse. C. R 133. 

Van Roi Mining Co. 

Vanadium 

Effect on steel 

Iron in rock-drills. .. .Wood Drill Works. New Jersey 

Ores, a^nalvsis of 

Prices of 

Prospecting for F. L. Hess.... 

Steel 1.^ 

Steel tests 

Uses of 

Vanning shovel assay for tin 489, 

Venezuela, mining code 

Ventilation of Rand mines 

Vestal. Frank A Cyanide plant at the Empire 

mines. Grass Valley 

Veta Colorada mill and cyanidation plant — I. II 

Bernard MacDonald. ... I 

Veta Colorado M. A S. Co 4, 

Victor Power & Mining Co 

Victoria Falls Power Co. report 

Victoria meeting, Canadian Mining Institute 

Editorial. . . . 

Victorian gold yield for July 

Mining legislation 



j.,. 1 

94 
337 

95 
18) 

23 
64 J 

73 

7oy 

38 
392 
516 
455 
551 
261 
280 
310 
230 
197 
161 
270 
832 
r.s:: 
487 
379 

410 

.'.IT 

100 

r.72 

197 
S43 
2 
504 
621 

117 
614 

99 
'is 7 
486 

332 
300 
533 

8» 
69 

59 
207 
149 

L't:: 

2R 

611 
506 
74 I 

771 
6 4 2 

65 
95 

- 

' 19 

5S4 
66S 
6 7 7 



617 
63 1 
Tss 
xo;: 
633 
264 
93 

: 

549 
682 
367 
366 
3 66 
629 
647 
266 
508 
358 
S35 



.86 



40 
40 

62 
549 



37<! 

nor. 



Vol. 10.3 



MINING AND SCIENTIFIC PRESS 



Page. 

Villa, Edward di Coal supply of Manchuria.... 53 

Vogel, Henry Treatment problem.... 63 1 

Vogelstein & Co., L 20.". 

Ditto Copper consumption in Germany.... .'ill', 169 

Ditto Tin statistics .... 182, 367 

Vogelstruis Estates & Gold Mines, Ltd Company 

reports 813 

Virtue Mines Development Co 128 

Von Bernewitz, M. W Fuel, power, and water 

supnly of Tonopah 761 

Ditto Gold and soot. .. . 11!' 

Ditto Huntington mill practice at Kalgoorlic . . . . 61* 

Ditto Metallurgy at Bendigo.... 290 

Ditto Metallurgy at Tonopah.... 828 

Ditto Persistence of ore in depth.... 377 

Ditto Power at the Waihi mine.... 591 

Ditto Rock crusher at Kalgoorlic.... 469 

Ditto Training of mine employees.... 336 

Ditto Two new treatment plants in 

Western Australia 118 

Ditto Water as an indication of ore.... r.or> 

Von Oppel views on ore deposition 430 



w 



Wages at Bingham 

At Globe-Miami district 

At Kalgoorlie 7)10, 

Of shovelers in Arizona Editorial.... 

Paid natives in Philippine Islands 

Waihi company 153, 

Mine, affairs at 

Mine, mining methods in the 

James L. Gilmour and \V. II. Johnston ... . 

Mine, power at the M. \V. von Bernewitz..., 

Waihi-Paeroa Gold Extraction Co 

Walker, Edward Extraction of tin from ores.... 

Wallaroo and Moonta. .. .Melbourne correspondence.... 

Walters Tunnel Co 

Wanakah mine 352, 

Wanderer mine, Rhodesia 283, 

War. effect on labor Editorial.... 

Europe and the Balkan Editorial. .. 

In Europe Editorial.... 

Ward-Leonard control in hoisting 

Wardner district, Idaho, genesis of tin- lead-silver ores. 

I'". L. Ransone . . . . 

Warehouse trucks for prospect claims 

Warten weiler, Alfred, death of 

Washington fiscal year Editorial.... 

Washington mine development 

Washington Power Co 

Washoe smelter 

Wasp No. 2 mine 414. 

Wasp No. 2 Mining Co 88, 

Wasp No. 2 zinc-boxes 

Waste at mines, disposal of 

Of carbon in mining coal 

Wastes in mining 

Water as an indication of ore <!. E. Collins.... 

Ditto M. W. von Bernewitz.... 

At Tonopah 

Corrosive effects of 

Costs in Western Australia 

From the Rio Tinto mine 

In California oilfields Editorial.... 

In mines 265, 

Meters 

Natural circulation of cooling 

Power at the Besshi mine 

Power costs at Waihi 

Power in Honduras 

Scum on 

Supply in Rhodesia 

Supply of New York 

Supply of the Rand 

Troubles at Quartz Hill, Colorado 

Waterman, Douglas 

Ditto Determining pitch of gears.... 

Ditto Step-bearing for slime agitator.... 

Waters, mine A. C. Lane.... 

Way-Arbuckle process, details of 

Process, de-watering and de-solutionizing cones 

Process failure at Benoni Consolidated 

Way's Pocket Smelter Co. machinery 

Webber, Morton.. Ore reserves and life extension .... 492, 

Wedge mechanical furnace L. S. Austin. .. 

Weed, W. H 

Well, samples of gas from an oil 

Wenatchee M. Co 

Werner on ore deposits 

West End Con. M. Co 27 

West Stewart mine fire 

West Virginia No. 1 claim 

Western Astralia 

Gold output 343. 

Miners' phthisis in 

Mining in 1911 

New mining regulations in 

Two new treatment plates in 

M. W. von Bernewitz. . . . 

University Editorial.... 

Western Chemical Reduction Co 

Western Federation of Miners 

Western metal mining Editorial.... 

Mining districts 

Westby, George C. . .Neutralization of smelter gases.... 

Wet methods of copper extraction Editorial.... 

Wettlaufer Mining Co. dividends 

Mine 573, 



284 
317 



ii I 
615 
786 
175 
613 

789 
i 

73 
528 
59 8 

96 
610 
50 3 
517 
585 
551 
434 

143 
291 
812 
38 
811 
23 
26 
175 
1 22 
705 
847 
153 
153 
111 
505 
761 
L' 2 fi 
628 
101 

74 9 
780 
814 
601 

3 64 
5 91 
753 
780 
837 
814 
823 
80 8 
505 
310 
375 
589 
186 
186 
183 

4 22 
669 
831 
232 
100 

96 
4 30 

64 
S03 

54 
134 
632 
308 
245 
308 

184 
293 

35 
126 

71 

S5 
524 
360 

44 
579 



Page. 

What are mining profits? Editorial.... 124 

Ditto J. R. Finlay 441 

Ditto Charles Janin.... 570 

Ditto Ernest V. Orford.... S01 

Wheal Kittv tin mine 250 

Wheeler, H. A Work at Great Falls.... 553 

Wheeler, H. V Increasing the dues of the 

American Institute of Mining Engineers 409 

Wheeler prospect 54 

Wheeling Mold & Foundry Co 486 

White Cap 10.8 

Mine production 544 

White Metal Development Co 94 

White Pass & Yukon road 129 

Wightman & Richards Co 480 

Wilfley table tops 814 

Tables at Tonopah-Belmont mine 247 

Tables in use in the worid 432 

Tables, power required 582 

Williams, Thomas Improvements in furnaces.... 592 

Williamson, W. D Regeneration of 

cyanide solution 49 

Wilson. Woodrow. elected president 584 

President-elect being advised Editorial.... 615 

Wincholl. Alexander N Geology of the 

National mining district, Nevada 655 

Winchell, IT V Kirunavaara . . . . 82 

WinchoU, N. H. library Editorial.... 2 

Wire 'killed' 714 

Wittich, L. L Profits in lead smelting.... 503 

Witwatersrand Native Labor Association report 247 

Wohlwill process of refining bullion 757 

Wolf, J. D Flotation patents ... 832 

Wolf, .1. H. G Production and allied 

statistics, California oilfields 402 

Wolf, W. A Sketch of the geology of Ecuador ... 110 

Wolverine mine 154 

Wolframite in Portugal F. Bronckart . . . . 758 

Wood fuel at Dawson and the Yukon 677 

Woodward, H. P Western Australia geologist. 

theories turn out correct S06 

Words and their use W. J. Sharwood.... 118 

Work along the Mother Lode C. W. Morse.... 403 

Existing upon claims 69 

Of the Aguacate mines P. G. Spilsbury. . . . 404 

Of the Cananea Copper Co L. D. Ricketts.... 565 

Work Mining & Milling Co 63 

Working costs of the Shannon mine. . . .J. W. Bennie. . . . 798 
Workingmen's compensation discussion at Mining Con- 
gress 718 

Workman, taking care of the Editorial.... 616 

World, international map of 630 

Wyoming, coal lands of Editorial ... .456, 475 

Golconda Editorial.... 456 

Sulphur deposits of 145 



X 

X-ray for examination of coal 154 



Y- Water Tin Co. operations at 64 2 

Yaqui Indians troublesome 643 

Yellow Pine mine, results from 841 

Yerington district, Nevada, mines of the 177 

Yerington Copper Co 127 

Yerington Mountain Copper Co 97 

Yuba Construction Co 94 

Yuba Gold Mines Co 62 

Yukon transportation Editorial.... 749 

Yukon Gold Co 155. 387 

Yuma-Wariior Mining Co 95 

Yuanmi mine, Western Australia, treatment plant at... 

M. W. von Bernewitz. . . . 148 



342 
284 

55 
11 
100 



Zaaiplaats tin mine 572 

Zimmerman on ore deposits 430 

Zinc and lead production by regions 

. B. S. Butler and J. P. Dunlop. . . . 

At Butte 

Box precipitate, smelting and refining 

H. R. Edmands. . . 

Box troubles 

Dust 

Dust, manufacture and uses 748 

Dust precipitation E. S. Pettis.... 151 

Dust precipitation at Black Oak mill 691 

Dust precipitation at Empire mine 588 

Dust precipitation at Oriental Consolidated. Korea... 564 

Dust tariff Editorial.... 815 

Experiments on short 55 

In copper ore 486 

Market in Boston 22 

Mines in New Mexico 272 

Ore development in Butte district 154 

Prices 123 

Prices at Joplin , 481 

Production in Utah in 1911 243 

Production of individual states in 1911 569 

Production of Nevada in 1911 . ." 211 

Smelting in Japan 630 1 

Statistics 134 

Zinc Corporation. Ltd 153 



1 




Whole No. 2711 YumbeVi 05 


SAN FRANCISCO, SATURDAY, JULY 6, 1912 


THREE DOLLARS PER A1THUM 
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INDEX TO ADVERTISERS, PACE 59 


PROFESSIONAL DIRECTORY, PAGES S-2k 


BUYERS DIRECTORY, PAGE 52 





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MINING AND SCIENTIFIC PRES1' 



July 6, 1912 




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MINING AND SCIENTIFIC PRESS 



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TABLE OF CONTENTS 



Page. 
1 

2 



EDITORIAL: 

Notes 

Colleges and Research 

Colorado Fuel & Iron Company 2 

The Geographical Basis of Industry [ 3 

ARTICLES! 

Veta Colorada Mill and Cyanidation Plant — I 

Bernard MacDonald 4 

The La Fortuna Mine p. j. Martin 7 

Gold-Mining Companies in Russia 8 

Industrial Lead Poisoning James O. Clifford 9 

Clarifying Cyanide Solutions 11 

Flotation of Minerals Kenneth A. Mickle 12 

Mining at Cripple Creek William H. Storms 14 

Mother Lode of the Klondike Harold French 15 

The Action of Mineral Sulphates and Arsenates of 

Cyanide Solutions Andrew F. Crosse 16 

A Light Prospecting Drill R. Y. Hanlon 17 

The Estimation of Ore In a Mine H. S. Munroe 18 

Goldfield Consolidated Report 19 

Switch-Boards for Small Mining Plants 30 

DISCUSSION: 

The New Calumet & Hecla Mill Subscriber 

Mutual Liability Insurance for the Mine-Owner.... 

Charles E. Parsons, 2nd; A. J. Pillsbury 
Mining Reports C. S. Herzig 

SPECIAL CORRESPONDENCE 

GENERAL MINING NEWS 25 

DEPARTMENTS : 

Personal 29 

Obituary 29 

Market Reports 30 

Current Prices for Chemicals 31 

Current Prices for Ores and Minerals 31 

Company Reports 32 

Book Reviews 33 

Recent Publications 34 

Concentrates 35 

Catalogues Received 36 

Commercial Paragraphs 36 



EDITORIAL 



CHINA has refused to accept the $300,000,000 offered her 
by the international banking syndicate. Loans are often 
refused, but not usually by the one who needs them. 



DISCOVERY of a new Rand near Denver has been 
enthusiastically announced. As a matter of fact, the 
fossil placers in Douglas county have been known for 
some time, but their extent and value remain to be de- 
termined accurately. The gold is fine, and how much can 
be saved is not certain. 



ILLINOIS petroleum fields have since 1905 yielded 158,- 
000,000 barrels of oil worth $103,000,000, according to 
Mr. R. S. Blatchley, of the State Geological Survey. Mr. 
Blatchley estimates that over $20,000,000 has been paid in 
royalties and perhaps an equal amount in bonuses, labor, 
and other local expenditures. Of the 20,000 wells drilled 
in the state 85 per cent have been productive. Such figures 
give a realizing sense of what it means to 'strike oil' in a 
corn-growing country. 



TT is now announced that the report of the special com- 
A mittee that has been investigating the affairs of the 
American Institute of Mining Engineers has been com- 
pleted and is in the hands of the printer. Copies will be 
distributed among members within a few weeks and will not 
be held back until the special meeting of the Institute which 
has been postponed till October 7. In stating the latter we 
misinterpreted a note from New York. We are glad the 
report is to be made public in advance of the meeting, since 
what is most needed is that each member shall have an 
adequate knowledge of the affairs of the Institute. More 
members are now taking an active interest in its affairs than 
at any previous period in its recent past. If the whole 
membership could be roused to a full realization of their 
privileges and duties, it would be worth almost any sort 
of an explosion. 



NOTABLE papers upon metallurgy will be features of 
the program of the Eighth International Congress of 
Applied Chemistry, to be held in Washington and New 
York early in September. Curiously enough, no papers 
upon cyanidation are listed in the preliminary announce- 
ment, though a half dozen upon the metallurgy of copper 
are promised. A paper upon the roasting of copper ores 
preparatory to leaching, by Mr. Utley Wedge, and another 
upon the extraction of copper by leaching, by Mr. J. 0. 
Handy, are of timely interest, while Mr. E. P. Mathewson's 
account of the development of the reverberatory furnace 
for smelting copper ores, and Mr. Frederick Laist's dis- 
cussion of the chemistry of the reduction processes in use 
at Anaconda will be as instructive as interesting. A study 
of the use of the electric furnace for the smelting of zinc 
ore, by Mr. F. T. Snyder, should throw light on another 
present-day problem. Discussions outside the metallurgical 
field are likely to be helpful in their collateral bearing, and 
engineers should plan, as far as possible, to be in New 
York during the first week of September. 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



LIBRARIES that are of value are those which have 
grown slowly; this is especially true of technical 
libraries, in which sets of journals and transactions are of 
first importance. The University of Minnesota has just 
become the fortunate recipient of what is* probably one of 
the best geological libraries in the United States. It was 
built up by Mr. N. H. Winchell during the course of his 
long and active professional career. As editor for many 
years of the American Geologist, he received practically 
even-thing of importance published on geology. He sup- 
plemented the gifts by liberal purchases of older books, and 
as a result has brought together a priceless working col- 
lection. It is particularly appropriate that these should go 
to the university in which he was so long an active factor. 
The collection will be known as the 'Winchell Library of 
Geology.' and donations and exchanges should hereafter be 
so addressed. It is hoped that engineers will remember to 
send copies of papers that they may publish. If one man 
can afford to give to his profession in this form practically 
the savings of a life time, certainly the others can afford a 
little thoughtfulness in return. 



CONSTRUCTION of a great mill at the mouth of the 
'Newhouse tunnel' at Idaho Springs, Colorado, was part^ 
of the oiiginal plan of Mr. Samuel Newhouse and his 
associates. It is gratifying to note that matters have pro- 
gressed to the point where the Argo Reduction & Ore Pur- 
chasing Company, organized by Mr. F. A. Schirmer and 
others now owning the tunnel, is prepared to build the first 
unit. Originally the tunnel was planned to drain the mines 
of Seaton mountain, Quartz, and other famous hills in Gilpin 
county, and to bring the ores to the south fork of Clear 
creek for milling. The work has been a success in draining 
the deep veins and measurably successful in the discovery 
of ore. It has afforded economical transportation and 
easy access to the ore; the treatment of the latter has re- 
mained to be solved. The ores mined are complex sul- 
phides and have hitherto been treated by stamp-milling and 
concentration. Tailing losses have been heavy; much 
heavier than was generally realized or admitted. It is an- 
nounced that in the new mill, to be erected under super- 
vision of Mr. Arthur H. Roller, cyanidation will be com- 
bined with amalgamation. Selection of Mr. Roller to guide 
the work assures the full benefit of local experience in ore- 
treatment. The task will be no easy one, but the size of the 
orebodies warrants large expenditure and careful work, 
and his professional associates will hope that Mr. Roller's 
success may be as prompt as his good record deserves. 

OOUTH AFRICAN mining conditions have been under 
^ severe criticism of late. Our Johannesburg correspond- 
ent has shown how the great consolidations of companies 
have not produced the favorable results that were antici- 
pated. In London, Mr. T. A. Rickard has been vigorously 
denouncing 'phantom profits' and drawing numerous ex- 
amples from the Rand, and in Johannesburg itself the voice 
of the critic has been heard. In discussing the matter be- 
fore the South African Institution of Engineers, Mr. W. L. 
Honnold took the ground that conditions are not so bad as 
has been urged. Admitting an average tenor of 27s. lid. 
for the past year, as against 28s. 6d. for the year before, 
he considers this to be due to a scramble for tonnage with- 
out regard to grade. While the working cost has appar- 
ently increased od. per ton, this is thought to be explain- 
able by differences in keeping books. Certain expenses 
formerly debited to capital account now are charged to 
operating expenses because additional capital cannot be 
raised upon satisfactory terms. These views are worthy of 
especial attention, coming, as they do, from an engineer so 
familiar with Rand conditions. At the same time it is not 



likely that criticism will be stilled. With idle stamps a 
scramble for tonnage is but natural, and if capital is timid 
it indicates a profound conviction that conditions on the 
Rand either are not so favorable as in the past, or that the 
favorable elements have been persistently overestimated. 
Mr. Honnold is exactly right in insisting that increased 
efficiency is the only available means of solving the prob- 
lems that Rand engineers are now meeting. 



Colleges and Research 



Colloids are objects of mystery to most engineers and 
many geologists, nor, indeed, are they well understood 
even by those who have devoted much effort to their study. 
That they must exert considerable influence in ore deposi- 
tion, hydro-metallurgy, and ore-dressing is generally recog- 
nized; the exact nature and scope of their influence is still 
in doubt. In a recent paper, Messrs. E. Hatchek and A. 
L. Simon have pointed out that silicic acid gels will reduce 
gold from its solutions, while Messrs. W. Reinders and C. J. 
Van Niewenburg have discovered that the presence of 
gelatin and other colloids markedly reduces the rate of re- 
duction of silver chloride by iron citrate. Evidently the 
problem is not a simple one. Colloids must be important 
in the dressing of ores, and especially in treatment of slime, 
but are little understood, since investigators in metallurgical 
plants are usually under pressure to secure results of im- 
mediate value and have neither time nor opportunity 
to carry out studies which do not appear to be instantly 
useful. The early studies of electricity exhibited no indi- 
cations of proving useful, however, and a large amount of 
investigation in the field of pure science must be carried 
on so that the data may be obtained from which to perceive 
possible applications. In this regard it cannot be denied 
that many of our mining schools are not living up to their 
ideals of service and are being led away by a false con- 
ception of the work they are properly called upon to per- 
form. The occupying of the valuable time of students at 
the universities in such matters as the loading of drill- 
holes and the sharpening of steel, matters which any in- 
telligent and mentally alert man can acquire from a few 
days' experience when necessary, and which may never be 
required in the whole of a long and useful life, is certainly 
not the most efficient use of time, equipment, and oppor- 
tunity. Much of the most advanced and most useful work 
is now being done outside the laboratories of the larger 
schools. Mining schools, as a whole, need galvanizing into 
renewed activity. 



Colorado Fuel & Iron Company 

Dividends, it is announced, will be resumed this month 
on the preferred stock of the Colorado Fuel & Iron Com- 
pany. The eight per cent cumulative dividend on this 
stock has not been paid for nine years, but there is now a 
surplus such as warrants hope that the arrears may be 
wiped out. The Colorado Fuel & Iron Company is one of 
the large institutions of Colorado and the history of the 
company and the state are woven together. The properties 
which formed the nucleus of its holdings were originally 
acquired by Mr. J. C. Osgood, in the interest of the Chi- 
cago, Burlington & Quincy railroad, which, it will be re- 
membered, once started ambitiously to build from Denver 
to the Pacific. Track was laid as far as Lyons, grading 
went some miles beyond, and rights of way and surveys 
extended well on to Utah. As part of the plan it was 
necessary to assure a fuel supply, and Mr. Osgood, a 
friend and associate of Mr. Perkins, then president of the 
road, was transferred to Colorado from Iowa, where he 
had made a success of the Whitebreast Fuel Company and 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



3 



had opened important mines along the line of the railroad. 
In Colorado he optioned a number of good coal properties. 
Then came the famous and bitterly contested strike of the 
Brotherhood of Locomotive Engineers. The company won 
the strike, but was so crippled that the plans for Western 
expansion were abandoned. 

Mr. Osgood saw the opportunity and promptly or- 
ganized a company which took over the options on coal 
lands and entered actively the business of mining and selling 
coal. Profits were put into the business, and first coke- 
making, then iron-making was taken up, and finally, to make 
a market for the iron, steel mills were built. All this re- 
quired capital, and, in the end, more than the business 
itself could supply. A market, too, for the steel was hard 
to secure. The railroads showed a strange and steady pref- 
erence for Eastern rails. The inevitable smash came, and 
with it the long to be remembered and theatrical contest 
of John W. Gates for control of the company. After the 
battle of ballots and court proceedings, the company passed 
into the hands of Mr. George Gould and Edwin Hawley; 
whereupon the rails were promptly in demand on the 
Denver & Rio Grande and the Colorado & Southern rail- 
roads. Markets have been found, the plants improved, and 
finally the business has caught up with the company. 

The story of this enterprise in all these features 
is typical of the West. A far-seeing man with eyes 
on the future overlooks the stones before his feet and 
stumbles, but in the end the enterprise that he founds 
makes good and benefits the state. In this instance it is a 
pleasure to add that Mr. Osgood found profit in the coal 
business, to which he returned after losing control of the 
big concern that he founded. 



The Geographic Basis of Industry 



The time value and place value of mineral deposits do 
not always receive the amount of attention they deserve. 
It is evident that ice, for example, is of no value at the 
north pole, but is immensely so in the tropics. California's 
oil deposits were of no value at the time J. D. Whitney 
examined them, now they are valued at many millions of 
dollars. The geographic basis of industry is somewhat 
obscured by the transportability of most products, natural 
gas being the most conspicuous exception. Wherever it 
occurs it has stimulated industry by affording cheap fuel, 
but in many cases even this is not able to counteract the 
disadvantages imposed by other conditions. Here again 
the time factor enters. The gas is often allowed to escape, 
and when conditions change later, and with an increase of 
population or the opening of means of communication the 
development of industry is made possible, the gas has in 
large part disappeared and the fuel supply has been lost. 
This evanescent characteristic of natural gas was exhibited 
in the zinc-smelting industry which sprung up in Kansas a 
few years ago, but as rapidly declined upon the failure of 
the gas supply. Gold and silver are so valuable and so 
easily transported that men will seek and win them wher- 
ever they may be found, but the less valuable metals have a 
marked place value. This is well illustrated in the case of 
iron ores of China, in which country ores of good quality 
are widely distributed, while coal for smelting is equally 
available. The native iron industry did not attain any 
considerable development, however, except in Shansi, where 
the ores are of poor quality and irregular in occurrence, 
but are associated with coal which contains a considerable 
percentage of phosphorus. By its use the natives are able 
to produce a high-phosphorus pig iron which can be used 
to make castings of remarkable thinness and perfection of 
outline, which find their way through the channels of trade 
even to districts where ores of better quality are found, 



but where the coal does not contain phosphorus. 

The place factor is not the only one, however, as is illus- 
trated by the brass fabricating industry of the Connecticut 
valley. This centre of supply for the United States is situ- 
ated on one edge of the area supplied, if a Hibernianism 
may be permitted. It is at some distance from its supply 
of coal, a large item in brass manufacture, and not at the 
centre of its markets, yet efforts to develop the brass in- 
dustry in Detroit and other Middle Western cities have not 
been markedly successful. An important reason for the 
Connecticut monopoly is the supply of skilled labor; the 
adjacent population has grown up with complete familiarity 
with the brass industry and resists efforts to transplant it. 
In time the labor supply at any point can be trained to the 
required degree of efficiency, but few companies are pre- 
pared to endure the intervening years of no profits. Else- 
where the Colorado Fuel & Iron Company is referred to at 
some length, and requires no more comment other than to 
call attention to the apparent paradox, that the easiest place 
to develop industry is not where none exists, but the reverse. 
The reason for this is evident, upon deeper reflection. The 
best place to open a shop is not in the suburbs where none 
exist, but in the heart of the city where there are many, lie- 
cause everyone desiring to purchase goods, so far as pos- 
sible, naturally goes to the largest centre of supply be- 
cause there the largest stock is available. There is always 
a small local demand in remote districts, but it never in- 
creases beyond narrow limits. Unless there is a clearly 
proved advantage in doing otherwise, the buyer always 
tends to purchase known brands from large houses which 
can be relied upon to always have them in stock, make good 
an occasional defeet, and supply the same goods at the 
same price whenever needed. The business advantage of 
this to the buyer is so marked that he can afford to pay 
higher prices than are required to obtain the material with- 
out these assurances. Centralization results, and the ten- 
dency is to build up industry at the points where it is 
already established, rather than distribute mineral produc- 
tion and manufacturing enterprises throughout the com- 
monwealth. Thus, though zinc is in brisk demand, the zinc 
resources of California, which are considerable, are not 
developed, nor seem likely to be, for the present, at least. 
Sulphur exists in considerable quantities in many parts of 
the United States, but the large deposits of Louisiana 
totally dominate the market. The textile industry of the 
United States skirts the eastern seaboard, where the streams 
descend from the piedmont plateau into the coastal plain, 
thus making water-power available, though most of* the 
wool is grown in the Rocky Mountain states, where water- 
power is abundant and cheap. No miner can afford to 
neglect this place factor in the development of mines. The 
copper deposits of Alaska, Peru, and Chile are large, but 
their remote situation imposes a handicap which is diffi- 
cult to overcome. The prospector who wishes to be sure of 
financial success should discover a 'porphyry copper" near 
Baltimore or Perth Amboy. 

The labor cost of industry is in most instances the con- 
trolling factor. Even in the manufacture of so expensive 
a raw material as gold it more than doubles the. cost. The 
cost of 14-karat gold is 61 to 64 cents per pennyweight, 
depending upon the market; the cost of working it in San 
Francisco is 68 cents per pennyweight. Where the raw 
material is of little value its cost of production frequently 
sinks into insignificance compared with the cost of utiliza- 
tion. It is often said that the worth of a book is its use, 
and the epigram is no less true of a metal. The develop- 
ment of the mineral industry is profoundly affected by 
geographical, chronological, and sociological conditions, and 
the prospector, to an important degree, needs to take these 
into account. 



4 



MINING AND SCIENTIFIC PRESS 



July (i. 1912 



Veta Colorada Mill and Cyanidation Plant— I 

By Bernard MacDonald 



Construction and Plan of Plant 
Design of Plant.— The plant of the Veta Colorada M. 
& S. Co. at Parral, Chihuahua, Mexico, was designed in 
1006, and. in accordance with the general scheme of cyani- 
dation plants of that date, provision was made for separate 
treatment of the pulp as sand and slime. Orders for the 
machinery were placed with different manufacturers, and 
the work of grading the site and construction commenced 
in 1907. The erection of the mill was then placed under 
the charge of a superintendent, who made certain changes 
in the design of the machinery and the arrangement of 
the cyanidation department, having in view its conversion 
to an all-sliming plant. Toward the end of 1907, on account 
of the panic then prevailing, the company suspended all 
work. Some of the machinery had then reached the ground, 
some was partly erected, some was en route, and a large 
part was still in the shops in the process of manufacture. 

The suspension continued until February 1910, when I 
was employed to complete the erection of the plant and put 
it in operation. My instructions implied authority to pur- 
chase such new machinery and make such rearrangements 
and modifications of the previous designs in erection as 
would be necessary to complete the plant and make it 
suitable for the then recognized improved system of oper- 
ation, but to retain and use, as far as possible, the machin- 
ery previously ordered. After numerous delays, the machin- 
ery reached the ground, was erected, and the plant went 
into operation in February 1911. 

Source and Character of the Ore. — The ore supply in sight 
consisted of the old dumps at the company's mine, amount- 
ing to about 50.000 tons, an indefinite quantity in the 
mine workings which were caved, and an indefinite quantity 
of custom ore promised from neighboring mines. The aver- 
age analysis obtained from the dumps and the old work- 
ings was: 

Per cent. Per cent. 

SiO, 69.00 Pb 0.03 

Fe 2 6 3 3.60 Mn Trace 

A1 2 0, , 9100 Cu None 

Zn 0.01 Ag (ounces) 12.5 

Au Trace 

The silver occurred mainly as sulphide in the ore, but 
subordinately in the form of chloride and bromide. 

Yard and Operating Facilities. — At the head of the mill 
a large patio or yard was excavated where the custom, 
dump, and mine ores are received. Tram tracks from the 
mine, dump, and railroad terminal converge on this yard, 
and from it a cross-track was laid down along the entire 
length of the mill with platforms at the various floor-levels 
of the mill and cyanidation plant for receiving supplies. 
The company's business and assay offices, warehouse, car- 
penter shop, and track scales are built on this yard. The 
coal-bins are situated immediately below the- yard-level, and 
from them the coal is lowered by gravity tram to the power- 
house. 

Power. — Electric power generated by steam in a plant on 
the ground is used for lighting and operating the machinery 
throughout the mill, with sufficient power to spare for the 
mining operations. Steam is generated in Heine safety and 
Fairbanks water-tube boilers, and the electric generators are 
operated by Harris-Corliss engines, with the generators 
mounted on the fly-wheel shafts. 

Mill Machinery and Equipment. — Below the level of the 
patio is the receiving bin for all classes of ore, from which 
it is fed over grizzlies (60-lb. rails inclined 42° and spaced 
4 in. apart) to the primary Blake rock-crusher, of Aus- 
tralian type with jaw dimensions 12 by 24 in. set to crush 
to 4-in. size. The product of this crusher joins the ore that 
passed through the preceding grizzly and gravitates over 



another leading to the secondary crusher, which has its bars 
spaced IV2 in. apart and set on an incline of 42°. The sec- 
ondary crusher is of the same kind and type as the first, 
with jaw openings 9 by 15 in. set to crush lV^-in. size. The 
product from this crusher joins that which passed through 
the preceding grizzly, all falling into a small steel-hopper 
collecting bin and automatically feeding upon an upwardly 
inclined belt-conveyor 10 in. wide and 30 ft. long, which, 
with a travel speed of 150 ft. per minute, delivers the ore 
into an open-bottom hopper from which it is spouted to a 
vertical elevator which carries it up to a hopper-bin set 
above the cross-conveyor built over the battery-bin. The 
vertical elevator is of the belt and bucket type, 18 in. wide 
by 40 ft. between centres with buckets 16 by 7 in. set IS 
in. apart. The cross conveyor-belt over the battery-bin is 
18 in. wide by 120 ft. long and is provided with an auto- 
matic traveling tripper which discharges the ore into any 
of the compartments of the battery-bin. This bin is flat 
bottomed, 12 ft. wide, 20 ft. high, and 120 ft. long, par- 
titioned off for each 10 stamps, and has a total holding 
capacity of 1300 tons with a run-off capacity of 1000 tons. 
Parallel with the cross conveying-belt a tram track runs over 
the bin. On this the lime required in the treatment is 
brought and it is mixed with the ore as the latter is delivered 
into the battery-bin. 

Sampling Mill Equipment. — From the stream of ore fall- 
ing from the collecting hopper at the delivery end of the in- 
clined conveyor-belt two buckets suspended at equal dis- 
tances apart between two endless chains cut out the sample 
by taking all the stream for the moment they are passing 
under the collecting hopper. In operation these buckets 
are carried over and discharge automatically into a 5-ton 
bin with 45° bottom, sheeted throughout with steel plate. 
This is the first cut-out sample. When desired the door of 
this bin is opened and the contents drawn off and fed to a 
7 by 10-in. Dodge crusher set underneath. The crushed 
product falls on steel plates, where it is shoveled and quar- 
tered, the reject sent to the vertical elevator and by it de- 
livered to the battery-bin, while the retained sample goes to 
a pair of 12 by 12-in. fine rolls, the product from which falls 
on the floor and is shovel-sampled, the reject being handled 
as before. The retained sample is then sent through two 
laboratory grinders in sequence, being shovel -quartered 
after each grinder and the final sample put through an 
Iler pulverizer, the entire product of which is quartered on 
oil-cloth and sent to the assay office. The cutting-down 
floor underneath the sampling machinery has an area of 
12 by 20 ft. and is sheeted with %-in. steel plate throughout. 

Stamps and Dewaterers. — From the battery-bin the ore is 
fed to the stamp-mortars by suspended Challenge feeders; 
the mortars weigh 10,500 lb. and are bolted to concrete 
foundations with a %-in. rubber sheet intervening. The 
stamps, of which there are 80, weigh 1050 lb. each and are 
set to drop 7 J /2 in. 104 times per minute. The depth of the 
discharge is 4 in. above the dies, about 1 in. above the ore- 
bed. The ore is crushed in the precipitated solution returned 
from the zinc-boxes and fed to the mortars with the ore in 
the ratio of S tons to 1 ton of the dry ore. Rectangular 
screens of the equivalent of 14 to 16 mesh were used, and 
35% of the pulp issuing from the mortars would pass 200 
mesh. The crushing capacity is about 5 tons per stamp. 

On issuing from the mortars, the pulp from each 20 
stamps is piped to a 4 by 4-ft. dewatering cone which 
overflows 20% of the batten 7 water with a varying quan- 
tity of 200-mesh pulp in suspension, this overflow being 
piped direct to the Dorr thickeners. The underflow pulp 
from these dewatering cones, containing between 6 and 7 
tons of solution to 1 of solids, is carried in floor (cement) 
launders to a collecting tank from which it spouts to two 
belt-bucket elevators which lift and deliver it to a dis- 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



5 



tributing box set 20 ft. above the floor. From this box it 
is equally distributed and carried in three distributing- 
pipes to three duplex Dorr classifiers each 5 by 15 ft. The 
slime portion of the pulp classified by these, of which about 
80% goes through 200 mesh, goes direct to the Doit thick- 
ening tanks, while the sand classification is distributed in 
pipes to the scoop-boxes of the tube-mill. 



classifiers, where it is received for re-classification along 
with the battery pulp underflowing from the dewatering 
cones mentioned above. Thus, the classification of the pulp, 
with the exception of that overflowing from the dewater- 
ing cones, is effected in a closed circuit and results in a 
slime classification going to the thickening tanks, 80% of 
which is of - 200 mesh. 




VETA COLORADA, GENERAL VIEW. 




AGITATING TANKS AND FILTERS. 



Fine Grinders. — There are five tube-mills set together, 
each 5 by 14 ft., operated at from 27 to 30 revolutions 
per minute. The discharge from all these mills is received 
in a cross-launder set on 10% grade, which in turn dis- 
charges into the boots of three belt-bucket elevators, two 
of which are kept in operation and one held in reserve. 
These elevators raise the tube-mill product to a distributing 
box from which it is led back through pipes to the Dorr 



•Pulp Thickeners. — The three Dorr thickening tanks 
which receive the classified slime are 36 ft. diam. by 12 
ft. high, and in them the collecting rabbles are geared 
to make one revolution every seven minutes. The clear 
solution overflowing from these tanks goes to a 12 by 36- 
ft. sump-tank, from which it is pumped back to the two 
head-supply tanks (set 30 ft. above the batteries), each 
of which is 12 ft. high by 36 ft. diam. When this sep- 



6 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



arated solution from the thickening tanks becomes suffi- 
ciently charged with silver to warrant precipitation, pro- 
vision is made to pipe it to a filter-press through which it 
flows by gravity and is clarified and then goes to the zinc- 
boxes for precipitation. 

Dilution and Elevation of the Thickened Pulp to the 
Treatment Tanks. — The thickened pulp underflow from the 
thickeners, containing about IV2 of solution to 1 of solids, 
is piped to the boots of two elevators by which it is raised 
to the agitation tanks. As this pulp is delivered to the 
elevators it is diluted by precipitated solution returned 
from the zinc-boxes mixed with the wash-water from the 
filter-presses to the consistence of 2:1, which was found to 
give the best results in treatment. 

The two elevators lifting to the agitation tanks are of 
the belt-bucket type, 55 ft. between centres, the belts being 
24 in. wide. One of these elevators is in constant use and 
the other held in reserve. The elevated pulp is received in 
a box, at the head of the elevators, fitted with a cover and 
false bottom of wire screen, into which the cyanide and 
lead acetate required to bring the solution in the pulp up 
to treatment strength are placed every hour, and are gradu- 
ally dissolved by the splash of the discharging pulp. Pro- 
vision is made for piping the pulp from the receiving 
box to any of the agitation tanks for treatment by the in- 
dividual-tank process, or for delivery into the first of the 
series of agitation tanks for treatment by the continuous 
process as desired. In the latter case, which was perman- 
ently adopted after extended trial, provision is made for 
the pulp to flow from tank to tank and be drawn from 
the last of the series to the filter-presses. 

Agitation Tanks. — The treatment or agitation tanks 
consist of a battery of six tanks which contains one stand- 
ard Pachuca tank, 15 ft. diam. by 45 ft. high, and 
five Parral tanks 25 ft. diam. by 42 ft. high, having 
holding capacities of 83 and 250 metric tons, respectively, 
of 2 : 1 pulp. The agitation is effected by compressed air 
in both tank systems; in the Pachuca tank in the usual 
way through a central lift-pipe of 16-in. diam., and in 
each of the Parral tanks by four lift-pipes each of 12-in. 
diam. set equidistant from each other and 2V2 ft. from the 
interior side of the tank. The discharge ends of the lift- 
pipes in t lie Parral tanks are set horizontal and so directed 
that the discharging pulp flows in the same direction as 
segmental cords with respect to the interior side of the 
tank. The force of the discharge pulp sets up and main- 
tains a rotary flow in the entire pulp charge from top to 
bottom of the tank. This rotary flow preserves the solu- 
tion and solid constituents of the pulp charge in proper 
proportional mixture and prevents the settlement of the 
pulp on the bottom of the tank into dead accumulations. 

Filter-Presses. — When the treatment cycle in the agita- 
tion tanks is completed, the pulp is drawn off to a battery 
of Kelly filter-presses, of which there were 8 operated 
hydraulically from a central platform in two units of 4 
each. Each of the presses is 5 by 15 ft. and contains 13 
leaves having a total filtering area of 1500 sq. ft. The 
Kelly filter-presses, and the excess-pulp, precipitated-solu- 
tion, and wash-water tanks are shown in the foreground in 
the illustrations. 

The operating cycle and results are as follows: Density 
of pulp received, 1.26; percentage of -200 pulp, 80; time 
charging and building cake, 13 to 28 minutes; expelling 
surplus pulp, 2; washing with precipitated solution, 10; 
washing with water, 3; drying with air, 3; discharging 
cake, 10; total cycle, 40 to 50 minutes; thickness of cake, 
% to 1 in. ; moisture in discharged cake, 15 to 18% ; assay 
difference between washed and unwashed cake, 3 grams 
silver. 

Disposal of the Cake. — The cake discharged from the 
filter-presses falls into a V-shaped box sheeted with steel 
plates which extended transversely underneath all the 
presses. In the bottom of this box is a right and left-hand 
screw-conveyor which works the discharged cake, mixed 
with water, to a central box where it is cut up with a 
chopper made of spikes inserted in a hub to the shaft 



of the screw-conveyor. As the cake is being chopped it 
is struck by a 1-in. stream of water under pressure-head 
of 200 ft. and thus mixed and diluted, it passes through 
the tailing launder, set on grade of 12%, to the tailing 
dump. 

Manipulation of the Filtered Solution. — The filtered rich 
solution from the presses is collected in a launder under- 
neath, from which it flows in a pipe to two collecting 
tanks each 10 ft. high by 20 ft. diam., from which it flows 
to five clarifying boxes, each having five compartments. 
These boxes are of the zinc-box type with baffle partitions 
between the compartments and 3 by 15 ft. over all by 5 ft. 
deep. Leaves of cocoa matting are placed in the com- 
partments and spaced 2 in. apart. The outflow from these 
boxes is piped to two storage tanks, each 36 ft. diam. by 
10 ft. high, from which the flow to the zinc-boxes was 
so regulated as to be continuous and uniform. 

Measuring the Solution. — These tanks were designed to 
be used alternately in feeding the zinc-boxes; when one is 
feeding the zinc-boxes the other is receiving the solution 
flowing from the clarifying boxes. With floats connected 
by ropes run over sheaves to weights which rise and fall 
along vertical recording boards in the zinc-room like those 
of railroad tanks, the zinc-room man is enabled to record 
Ihe cubic feet or tons of solution that passes each shift of 
12 hours through the zinc-boxes. 

Sampling the Solution. — The solution coining to the zinc- 
boxes is sampled by a drip-cock tapped into the main de- 
livery pipe, and thus the tonnage of solution going through 
the zinc-boxes, and its assay value, is recorded. In like 
manner the main pipe carrying the precipitated solution 
from the zinc-boxes to the precipitated solution sump-tank 
is provided with a drip sampler, the assay of which sub- 
tracted from the head sample shows the amount precipi- 
tated in the boxes. 

Return of the Solution. — The sump-tank is 10 by 36 ft. 
and the precipitated solution received in it is pumped back 
to an intermediate sump-tank from which the amount re- 
quired for diluting the pulp going to the elevator lifting 
to the agitation tanks is supplied, the amount not needed 
for this purpose being pumped back to the supply-tanks 
at the head of the mill. 

The Precipitation Room. — The precipitation of the rich 
solution is effected by zinc shavings in 11 zinc-boxes, each 
box having five compartments, 3 by 3 by 3 ft., for the 
zinc shavings and having a total holding capacity of 1331 
cu. ft. of shavings. As a rule only four compartments of 
each box were charged with shavings, since the precipitation 
is complete in four of the compartments. From the bottom 
of these compartments, which are pyramidal in shape, a 
pipe with stop-cock is provided for the discharge of pre- 
cipitate during the clean-ups, which are made weekly. The 
precipitate, with the associated zinc shorts, as discharged 
from the zinc-boxes, is flushed and brushed through half- 
round steel launders to a collecting sump-tank provided 
with screen trays at its top, throusrh which the precipitate 
passes. The zinc shorts, -f- 60 mesh, in the precipitate are 
caught in the screening; trays, where they are scrubbed and 
washed and removed from time to time, and returned to 
the head compartments of the zinc-boxes, where they are 
gradually consumed by the flow of the rich solution enter- 
ing for precipitation. 

Filter Pressing the Precipitate. — From the sump-tank 
the precipitate is pumped through a Dehne press, 8 by 2*/2 
ft., with 30 leaves having a total filtering area of 650 sq. ft. 
The effluent solution from the precipitate press goes to the 
zinc-boxes, where any escaping precipitate is caught in 
the zinc shavings. 

Fluxing and Drying the Precipitate. — When the cake of 
precipitate is built in the press it is discharged into a 
shallow box run on flat wheels underneath the press. In 
this box the precipitate when sampled for moisture is 
weighed, mixed with the required fluxes, and filled into 
iron trays 30 by 10 by 4 in. and placed on the shelves of 
a steam-drying cabinet. This is a closed cupboard-shaped 
box made of '/,,,-in. steel plate, measuring 8 by 6 by 3 ft., 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



7 



with shelves made of l^-in. pipe extending from 3-in. 
headers at the sides, through which low-pressure steam 
generated in an upright 5-hp. boiler circulates. The cabi- 
net can be securely locked and serves as a safe for the pre- 
cipitate until needed for melting. 

Melting and Sampling. — For melting the precipitate 
there are three Steele-Harvey tilting oil-fired furnaces, con- 
taining No. 275 Monarch crucibles, into which the dried 
and fluxed precipitate is charged and the melt effected. 
The bars weigh from 70 to 75 lb. avoirdupois each, and are 
sampled by boring at opposite corners of both sides s / 16 -in. 
holes to the depth of 1 in. The silver in the bars ranges 
from 850 to 900 fine. 

Air-Compressors. — An Ingersoll-Rand, type 10, air-com- 
pressor generates the compressed air used for agitation, 
filter-pressing, and air lifts. This compressor has a sea- 
level displacement of 1000 cu. ft. of free air per minute, 
and at (he plant, 6000 ft. elevation, about 80% efficiency is 
obtained. The pressure carried for this plant is 30 lb. per 
square inch. 

Motors. — Westinghouse motors are used throughout the 
plant, the type being 3-phase, 25 cycle, 440-volt, alternat- 
ing current. Their number, where used, rated horse-power, 
hours run per day, and power consumed is as follows : 









Con- 


Run- 






Rated 


sumed 


ning hr. 


No. 


Used to run 


hp. 


hp. 


per day. 


1 


Two Blake crushers and belt 










bucket-elevator 


50.0 


49.7 


10 


1 




5.0 


2.7 


10 


1 


Sampling' mill machinery. . . 


15.0 


5.0 


8 


4 


Stamp batteries, one to each 












200.0 


198.8 


24 


3 




5.0 


3.0 


24 


1 




20.0 


12.7 


24 


5 




200.0 


155.0 


24 


3 




3.0 


1.0 


24 


1 


One belt bucket-elevator to 












10.0 


4.2 


24 


1 




10.0 


5.3 


20 


1 


Triplex pump returning so- 












20.0 


16.8 


20 


jii 


Triplex pump returning so- 












15.0 


7.6 


20 


i 


Triplex pump returning so- 












7.5 


2.0 


20 


i 


Pump and lathe in zinc room 


5.0 


5.7 


10 


i 


Ingersoll-Rand compressor.. 


100.0 


83.3 


24 


i 




40.0 


32.0 


24 




Lighting (417 hp-hr), from 












17.4 


17.4 


12 


28 




722.9 


602.4 





From the table it will be seen that the 28 motors con- 
nected with and driving the milling machinery, have a 
total rated capacity of 722.9 hp. and that these motors 
when carrying the full load of all machinery running 
together, including the pro-rated lighting, consumed 602.4 
hp., 83% of the nominal power of the motors, or say, 1.5 
hp. per ton of milling capacity. 

(To Be Continued.) 



Complete returns of the coal production in the states 
of the Rocky Mountain region in 1911 have been received 
by E. W. Parker, of the U. S. Geological Survey. The 
eight states included, namely, Colorado, Idaho, Montana, 
Nevada, New Mexico, North Dakota, Utah, and Wyoming, 
produced in 1911 a total of 26,044,387 short tons, valued 
at $40,098,747. Although no coal was produced in Nevada 
in 1910, the output of the seven other states was 28,857,413 
short tons, valued at $43,776,715, indicating a decrease in 
1911 of 2,813,026 short tons, or 9.7% in quantity, and of 
$3,677,968, or 8.4% in value. This decrease was due to 
the resumption of mining in the Mississippi Valley states, 
the idleness in which, caused by the strike in 1910, resulted 
in extraordinary demand on the mines of most of the 
Rocky Mountain states. The total number of men em- 
ployed in the coal mines of the Rocky Mountain states was 
33,783, who worked an average of 219 days, against 34,652 
men for an average of 245 days in 1910. 



The La Fortuna Mine 



By F. J. Martin 

During the early nineties a large number of men were 
on the desert of southern California, Nevada, and Arizona, 
prospecting for placer gold. A dry-washing machine had 
been invented that seemed to answer the purpose of a 
rocker or long-torn. And although nothing particularly 
good in the way of placers was found, the excitement 
proved to be the means of a number of good lode mines 
being discovered; among them the Yellow Aster in Kern 
county, California, and the La Fortuna in Yuma county, 
Arizona. 

As is well known, few live springs of water exist on 
the desert, especially in Arizona, but nearly every moun- 
tain range contains natural depressions which are filled by 
summer and winter showers. These 'tanks' vary in size 
and retaining capacity. Those filled with coarse sand and 
gravel are less liable to be drained by wild animals and 
evaporation. It was at one of these tanks that three pros- 
pectors, Halbert, Albert, and Thomas, had their camp in 
the winter of 1894, on the western slope of the Gila City 
range of mountains, about twenty-three miles southeast of 
the town of Yuma. They had been there but a few days 
when Thomas found some good-looking 'float' in one of 
the main washes, and it did not take him long to trace it 
to the croppings, which were quite prominent, and rich. 
Pieces broken at random from any part of the vein, when 
ground and panned, showed a long string of colors, some 
of which were as large as wheat grains. 

It is remarkable that no one had ever taken the trouble 
to investigate those croppings before, since a well-beaten 
smugglers' trail led by not a hundred feet away. While 
the smugglers were intent on beating the Mexican or United 
Slates government out of a, few dollars, there was an un- 
suspected fortune staring them in the face. 

It is wonderful how news of a discovery spreads. One 
may be on the desert prospecting weeks at a time without 
meeting a soul, but let a rich prospect be discovered, and 
before he is aware of it, the place is swarming with men. 
I have seen notice of location of valuable claims written 
on cigarette papers, about one and a half by three inches 
in size, the locators having rushed pell-mell to the new dis- 
trict with nothing but some tobacco and cigarette papers, 
the inevitable article always in evidence on the southern 
desert. As soon as the news of the find reached Yuma, 
the recorder, a man named Pool, sent word to his friend, 
R. M. Straus, who was at the Haraqua-Hala mine during 
its palmy days and who had requested Pool to keep him 
informed of anything new. Straus lost no time in getting 
on the ground, and, being well and favorably known, had 
no trouble in securing a bond on the property at a price 
of $150,000. He took the matter to C. D. Lane, of Utica 
mine fame, and persuaded him to go and examine the 
property. It proved to be a case of love at first sight 
with Lane. The locators had sunk a hole about 30 ft. 
deep by this time, and had shipped a carload of selected 
ore to a smelter and received over $70 per ton. 

Mr. Lane decided to develop the property immediately, 
and a force of men was put to work. The 'tank' water 
by this time having all been used, water had to be hauled 
from Blaisdell station, on the Southern Pacific railroad, a 
distance of 14 miles. The railroad company charged 10c. 
per gallon for this, having brought it from Sentinel, 80 
miles distant, in tank-cars, and stored it in a cistern built 
of concrete on the ground. The railroad company main- 
tains these cisterns at all their dry stations and section- 
houses, and prospectors are welcome to all they can make 
use of, for themselves and burros, free of charge. Sev- 
eral months after Lane became interested, I visited the 
camp. Much sport was being made over the scarcity and 
expensiveness of the water, it being sold in camp at 25c. 
per gallon. The supply ran low several times, and the 
men claimed that they had to wash in left-over soup, 
after which the soup was used for drilling. They said 



8 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



tbe soup didn't always have the first use — but all agreed 
that the last use was for drilling. 

When the shaft, which was sunk in the centre of the 
main lens, had reached a depth of about 200 ft., Mr. Lane 
decided to buy and equip the property. A 20-stamp mill 
was erected, each stamp weighing 1450 lb.; a compressor 
and hoist were set up with four 80-hp. boilers; shops, 
store, boarding-house, and buildings were built, and a good 
well was sunk at the Gila river, a pumping station built, 
and a 4-in. screw pipe-line laid to camp. This furnished 
an ample supply of fairly good water. 

The vein occurs in the middle of a large belt of amphib- 
olite schist, which extends across the mountain range a 
distance of fully ten miles, dipping under the desert on 
both sides, and it is about three miles wide, gradually 
merging into a mica schist at either side, and from that 
into granite. The beds of this schist lie at an angle of 
about 60°, the strike being east and dip south. The quartz 
differs from any I have ever seen. It was mostly rose 
colored, and the best of it was glassy and transparent, 
slightly tinged with green in places, although it contained 
no copper. It was the freest milling ore I ever saw; and 
a most remarkable feature was that the ore became freer 
from base metals with depth, although it contained very 
little near the surface. The vein follows the strata, both 
downward and lengthwise. Near the surface the ore was 
in short lenses, being about as broad as long. The largest 
discovery lens was about 30 ft. wide and 40 ft. long; 
but gradually this changed until at the 500-ft. level the 
ore formed one continuous pay-shoot about 3\'2 ft. wide 
and 500 ft. long. Many faults were found, varying in 
amount of throw and in direction. The greatest movement, 
beyond which the ore was again found, was 600 ft. Finally 
the main fault was encountered and t he vein was not found 
again, although the line of the fault was followed from 
a little below the 1000-ft. level, where the ore was finally 
cut, to the 2000-ft. level. By this time all the ore had 
been worked out, and the company did not care to levy 
assessments to prospect further. I favored another effort, 
since shortly before closing the mine I discovered what 
I believed to be the main fault, in the foot-wall of ore 
then followed, and concluded the prospecting had been 
conducted in a wedge-shaped piece of country rock which 
had been shoved up from below. I hope some day to 
interest capital in further prospecting on the foot-wall 
or what I believe to be the main fault. The vein was 
as strong and the ore as good where faulted and lost as 
at any point above. 

The last sample taken from the lowest point assayed 
$40 per ton. This is almost three times the general aver- 
age of all the ore treated. "Waste finds its way into all 
mills, which increases the tonnage but reduces the value. 
At the Fortuna a total of 180,780 tons was milled; it 
yielded on the plate $2,505,931. A considerable quantity 
of the taili ng was lost by cloudbursts washing it away, 
but that treated by cyanide returned $377,144. The total 
gold recovered was $2,883,075, which gives an average 
value of $15.94 per ton of all ore worked. The general 
store, operated in connection with the mine, made a profit 
of $30,000. The cost of mining, milling, and cyaniding 
was $1,377,375. This includes prospecting for the lost 
vein, and the upkeep of plant. The plant cost in the 
neighborhood of $200,000, and $155,700 was paid to the 
locators, Thomas at the last moment insisting on getting 
$5000 for finding the vein, and the contract making it 
expedient to pay this. The locators also received $100 per 
month during the life of the bond, seven months. The 
balance, $1,180,000. was paid out in dividends. 

When Mr. Lane decided to buy and equip the property, 
he organized a company and invited numbers of his oid 
employees and friends to join him on equal footing with 
himself, guaranteeing them against all losses. He consid- 
ered himself entitled to a bonus of $5 for every dollar 
he had risked in proving the property a safe investment, 
and all stockholders agreed in this. This bonus amounted 
to $75,000. All those invited to join took advantage of 
this offer, with the result that many a little 'nest-egg' was 



laid by and several good men were enabled to get upon 
their feet. 

It is a notorious fact that almost all the good mines 
on the desert have been found by drunkards, who sold for 
a shoestring to get quick money to go on a spree, or 
if they happened to get a fortune for their find, it only 
meant a more protracted spree. There have been excep- 
tions to this rule, and the La Fortuna, which was happily 
named, was a striking one. Everyone in any way con- 
nected witli the mine did well. Even Pool, the recorder, 
received $5000 for his small pains in having notified his 
friend Straus of the find. Thomas bought a walnut grove 
near Santa Ana. Albert went back to France, Halbert 
engaged in the ice business, the stockholders got back over 
$5 for every $1 invested, and all blessed the day the La 
Fortuna was found. 



Gold-Mining Companies in Russia 

Russian and foreign gold-mining companies operating 
in Russia and Siberia, with the capitalization of each, 
are listed by the Mining Journal. The list, with some addi- 
tions and corrections, is as follows: 

1. Russian Gold Co rubles 3,375.000 

2. South Urals Gold Co., 'Rossia' " 300.000 

3. North-Eastern Siberian Co " 3,000.000 

'4. Troitsk Goldfields, Ltd. (Katchkar district, 

Orenburg) £625,000 

5. Tushetoabanovaky and Tzentzenshan- 

ovsky Aimaki (Mongolia) rubles 1,800.000 

6. Alexandrovsky Gold Co " 80,000 

7. Amur Gold Co " 3,000,000 

8. Draga (Dredge) Gold Co " 500,000 

9. Transural Mining Co " 4,500,000 

10. Societe Anonyme des Mines d'Or du 

Katchkar (Orenburg government) . " 4,500.000 

SEL Industrial Co " 7,000.000 

12. Lena Gold Mining Co " 11,100,000 

13. Lena Goldfields, Limited £1,405,000 

14. Orsk Goldfields. Limited £920,000 

15. Borovinsk Gold Co rubles 844,308 

16. Yerchinsk Gold Co., Limited £1,100,000 

17. Central Ural Gold Co rubles 1,000,000 

IS. Tumninsky Gold Co " 1,000,000 

19. Phedorovsky Gold Co " 2,000,000 

20. Wagransky G. M. Co. (North Ural), Ltd.. £100,000 

21. Siberian Gold Dredging Co.. Ltd. (Great 

Kujah river, near Tomsk, Western Siberia) £200,000 

22. Siberian Proprietary Mines, Ltd. (holds 

interests in the Orsk Goldfields, Ltd.; 

Troitsk Goldfields, Ltd., and Kluchi Gold 

Mines, Ltd.) £135,000 

2:!. Kluchi Gold Mines. Ltd. (Merchinsk district, 

Eastern Siberia) £400.000 

24. Pioneer Company of Siberia £100,000 

In* Durango. Mexico, about 50 miles northeast of Cedros, 
a large vein carrying cerussite occurs. It is 50 ft. wide 
where cut through by a small creek; below this it lies 
on a side-hill slope, dipping about 45°, and exposed by 
erosion for 1500 ft. in length and 500 to 1000. ft. on the 
dip. There is an old inclined shaft, 50 ft. deep, at the 
point where the creek cuts it ; the ore is there much oxi- 
dized, some of it assaying 20% lead, $1.50 gold, and 5 
to S oz. silver per ton; occasionally a little zinc occurs. 
The country rock is andesite. The mine is on the east 
side of the Coast range, close to the foothills of the Sierra 
Madre, and quite inaccessible. A few miles north of it 
is an old trail leading up into the mountains which can 
only be followed in places where hewn out of the rocks. 
The trail is in a mild unsettled section, and it is possible 
that it leads to the lost Tiopa mine which so many have 
hunted for. 

Irok ore deposits at Gogo Soco, in Minas Geraes, Brazil, 
are to be developed by the Gogo Soco Syndicate, Ltd., of 
England. 



July 6, 1912 MINING AND SCIENTIFIC PRESS 



Industrial Lead Poisoning 



By James 0. Clifford 



Introduction 

There are few matters worthy of greater consideration 
by American lead-mining and smelting men than prevent- 
ive measures to insure to employees freedom from plumb- 
ism. The subject has been given attention by lead pigment 
manufacturers, but mining and smelting companies have 
remained indifferent. Prior to the year 1900 the same con- 
dition existed in Europe, but a thorough investigation of 
the danger from plumbism to which lead-workers were 
subjected led to governmental legislation. The regulations 
imposed by European nations in this connection have been 
attended by highly gratifying results. Experience having 
pointed the way, there is reason to believe that similar 
legislation in America would prove equally beneficial. Em- 
ployers can, however, anticipate such action by affording 
their employees all necessary protection. In two or three 
states statutes have been enacted regulating the conditions 
under which laborers may be employed in the lead indus- 
tries. While the effort, to protect employees by state legis- 
lation is highly commendable, it is not comparable to fed- 
eral supervision. 

Plumbism 

Lead is a subtle poison. Of all industrial poisons it 
is the most productive of ill health. Some persons are 
more readily influenced by it than others; there is, how- 
ever, no special type of constitution which is the more 
likely to be influenced thereby, nor is there any racial 
predisposition. Generally speaking, young persons are 
more susceptible to its influence than those of maturer 
years. Alcoholic excess and the use of tobacco have been 
conclusively demonstrated to be harmful factors in pre- 
disposing to plumbism. 

Primarily, plumbism is a question of elimination of 
the lead taken into the human body failing to keep pace 
with its absorption. The repeated entrance of lead into 
the system in minute quantities over a lengthened period 
of time is more productive of harm than the absorption 
of that element in larger doses upon only a few occasions. 

There is no specified length of time of exposure neces- 
sary to produce plumbism. Physical condition of work- 
men's health and other general circumstances determine 
this factor. At lead mines and smelters, where even ordi- 
nary precautions are not taken by either employers or 
employees, it is not unusual for laborers to evidence symp- 
toms of the disease within a week following their engage- 
ment. Acute lead colic is often induced within periods 
of from two to six weeks. Recurrences of plumbism in 
employees engaged in lead mining or smelting are frequent; 
instead of conferring immunity, one attack of poisoning 
prepares the way for another. 

Lead is dangerous, whether in the solid, liquid, or 
gaseous form. The solubility of lead compounds by the 
secretions of the body is an index to the development of 
plumbism. By experiment it has been determined that, 
in order of their solubilities by the stomach and the re- 
spiratory organs, lead oxide is the most soluble, followed 
by lead carbonate, lead sulphate, lead sulphide, and metallic 
lead, in the order given. 

Lead enters the body through the skin, the respiratory 
organs and the alimentary canal. Of these the skin is 
the least important. Lead dust or fume, carried into the 
bronchi, trachea, and lung cells is there deposited, and by 
the influence of heat and moisture the lead compounds are 
moistened by fluids rich in carbonic acid coming from 
the lungs and converted, first into carbonate, and subse- 
quently into bicarbonate, in which form it is fairly soluble. 
The entrance of lead through the alimentary canal is, next 
to the respiratory organs, the most common mode of en- 
trance. Lead dust, caught in the mouth, is partly dis- 
solved by the saliva and swallowed. Entering the stomach, 



the lead is acted upon by the gastric juices where the lead 
dissolved is converted into a soluble and diffusible chloride, 
in which form it is readily absorbed by the blood. While 
the entrance of lead through the skin is not so important 
as the two modes above outlined, it can readily be absorbed 
through the pores of the skin, exposed membranes (cuts, 
bruises, and sores), and the inner surface of the eyelids. 

Symptoms 

One of the earliest signs of plumbism is the peculiar 
anemic appearance of the victim. This is accompanied 
by a disagreeable metallic taste in the mouth, a feeling 
of sickness, with tendency to vomit. The tongue is coated, 
and the breath fetid. Disturbed digestion, poor appetite, 
obstinate constipation, and a sense of fatigue dispropor- 
tionate to the amount of energy expended is also com- 
plained of. At about this period- there is developed a 
severe pain in the abdomen, accompanied by vomiting. 
Swelling of the gums and severe headaches often accom- 
pany the above symptoms. 

Upon examining the victim's gums a persistent blue line 
is observed close to the teeth. If the patient is toothless 
the blue line is absent. Occasionally the surface of the 
tongue shows a similar coloration. The urine is scanty 
and frequently contains traces of albumen. On chemical 
examination of any vomit lead will be detected. As a 
rule the saliva of the patient contains no sulpho-cyanate 
of potassium. On the addition of a few drops of ferri- 
perchloride solution to the saliva of a healthy person a 
brownish red ring will be seen where the two fluids meet. 
This characteristic is absent in the saliva of a lead colic 
patient. 

The blue line on the gums is, when accompanied by 
other symptoms, a valuable aid in diagnosing plumbism. 
Too much importance cannot be attached to this blue line, 
however, as similar blue lines often develop on the gums 
of persons who have taken, internally, large doses of bis- 
muth, or have used a bismuth mouth-wash for ulceration 
of the gums and mucous membranes of the mouth. Also, 
there is occasionally observed on the gums of persons 
using carbolic acid solutions, or charcoal tooth-powder, a 
bluish black line. On the gums of copper-workers a bluish 
green line >s apparent. In many instances a blue line 
on the gums of lead-workers is present when other symp- 
toms are absent. The reverse of this is correspondingly 
true. In consequence of the foregoing, the presence of 
a blue line on the gums is not, in the absence of other 
symptoms, a conclusive indication of plumbism. 

Effects 

For a varying period there may be an elimination of 
lead from the body which bears a constant ratio to its 
absorption. It is when a check is placed upon elimination 
that there commences a storage of the poison. Plumbism 
is not always a question of any stated amount of lead 
being present in the bodv. The reason for this is that 
some are more susceptible to its influence than others ; 
and besides, lead may, by destroying the functional activ- 
ity of the eliminating organs, favor the retention within 
the body of poisons generated by the individual himself, 
autointoxication, so that the patient suffers, or dies, from 
a mixed form of toxemia. 1 

The effect of lead varies with the constitutions of the 
individuals attacked thereby. There cannot be any fixed 
rule. Common results of plumbism are: lead blindness; 
temporary loss of hearing, smell, and taste; stimulation 
into activity of neurosal tendency, to which the patient 
is hereditarily or otherwise predisposed ; loss of teeth, ac- 
companied by serious ulceration of the mucous mem- 
branes of the mouth ; continuous headache, dizziness, sleep- 

iQliver, 'Gulstonian Lectures.' 



10 



MINING AND SCIENTIFIC PRESS 



July 6, L912 



lessness, tinkling in the ears, and weakening of will and 
intellect; chronic constipation; and paralysis of (he hands 
and feet. 

Another item of interest and importance is the length 
of time lead may remain in the body. Years after the 
symptoms of poisoning first show themselves, and appar- 
ently have disappeared, there may be fresh signs of in- 
toxication, even though the individual had not been ex- 
posed to the absorption of lead following the first in- 
stance. 

The main channels of elimination of lead from the body 
are the kidneys and intestinal canal. During the period 
of elimination, which may extend over many years, these 
eliminating organs often undergo structural changes, and 
in view thereof may induce death either as contributory 
or immediate causes. 

From the foregoing paragraph it might be of interest 
to state that as the result of numerous post-mortem exam- 
inations of victims of plumbism, that disease was deter- 
mined to have been either a contributing or immediate 
cause of death, depending upon the individual case. In 
the instances mentioned, the immediate causes of death 
were as follows: acute plumbism; chronic plumbism; acute 
gastritis; chronic gastritis; apoplexy; Bright's disease; 
paralysis; heart disease, and cirrhosis of the liver. 

Prevention 

In the prevention of plumbism cleanliness of the indi-* 
vidua] and work places cannot be too strongly insisted 
upon. Lavatories with a sufficient supply of hot and 
cold water should be furnished by the employer and daily 
bathing encouraged. In dusty atmospheres, respirators 
should invariably be used. Food should not be eaten at 
any time or at any place until after the face and hands 
have been washed, and the mouth and throat rinsed thor- 
oughly with an alkaline mouth-wash. In this connection 
a mouth-wash of 0.2% solution of sulphite of soda will 
be found highly beneficial. The use of alcoholic liquors 
and tobacco should be prohibited. Employees should never 
begin the day's work without first having had food. Per- 
fect ventilation should be established in all places where 
there is danger of dust or fume. Employees should take 
care to keep the bowels open. Proper foods, rich in fats 
(and in this milk is included) have a preventive value 
beyond question. The most effective protectives against 
the disease are cleanliness and sobriety. Medical exam- 
ination of employees once or twice monthly should be 
made compulsory. Some companies provide tabloids con- 
taining 5 grains of hyposulphite of soda to be taken by 
employees once daily. 

Danger to Employees 

Lead Miners. — There are comparatively few miners who 
have worked in lead mines for any considerable period 
of time that have not suffered from plumbism. The ma- 
jority of cases have' been the acute form, but there are 
numerous examples of the effects of chronic poisoning. 
In lead mines (or in other mines where lead is a constitu- 
ent of the minerals mined) great danger of plumbism to 
miners is occasioned by the dust given off from the ore 
and which they cannot avoid inhaling. This condition is 
intensified in poorly ventilated mines by reason of the 
fumes from the powder used in blasting and the smoke 
from candles. In consequence of the two latter evils, min- 
ers often suffer from fibrosis — a hardening of the lung 
tissues due to mild inflammation of the supporting texture 
of the lungs. Impure drinking water, poor food, and 
unsanitary living quarters are harmful factors. Alcohol- 
ism and the absence of cleanliness among certain classes 
of miners, are important contributory influences. In small 
mining camps medical attention is not always available. 

Lead Smelters. — The danger from lead-smelting opera- 
tions is not confined to the immediate property. The dust 
and fume liberated from smelter stacks are a source of 
danger to inhabitants in the immediate vicinity of the 
plant unless the diffusion of the gases therefrom is com- 
plete and the quantity of lead and other harmful com- 
ponents relatively low. 



Calcining and Beverberatory-Furnace Workers. — The 
main danger to employees operating either of the two fur- 
naces named lies in the drawing off of the charge. It is 
not unusual to note that, in drawing the furnace charge, 
workers often suffer from smothering, resulting from the 
fumes and dust given off by the hot or molten material. 

Blast-Furnace Workers. — The dangers incident to lead- 
smelting in blast-furnaces are. the dust given off when plac- 
ing the charge, and the inhalation of fumes escaping from 
the charging-floor, lead-well, slag tap-hole, open hearths, 
matte and slag cars. Slags vary in melting point from 
1000 to 1500°C, whereas the melting point of lead is 
325°C. Under these conditions the danger from lead 
vapors given off is apparent. From analyses of fume 
escaping from molten lead and molten slag it has been 
calculated that in eight hours a man might breathe seven 
grains of lead. 2 The danger from dross raked from lead 
melting-pots and deposited on the floor to cool is a source 
of great danger. 

Zinc Smelters. — According to Ingalls: 3 "Fumes of zinc 
oxide appear to be quite harmless to human beings, but 
when the ore subjected to distillation contains lead there 
is danger of poisoning by the fumes of that metal." In 
view of the foregoing, it might be of interest to state 
that, while the lead content of the average grade of zinc 
ores subjected to distillation by American smelters is com- 
paratively low (averaging from 1 to 8% Pb), it is not 
unusual to treat ores containing as high as 20% lead. 

"Refiners. — While electrolytic refining of silver-lead bid- 
lion has superseded, to a great extent, the Parkes, Pattin- 
son, and other older methods, the latter, where used, are 
a source of great danger to employees. 

European Governmental Regulations 
In Europe laws have been enacted by several nations 
relative to the protection of employees engaged in the 
lead industries. Of especial interest are the regulations 
imposd by the British, German, and French governments, 
excerpts from which are given herewith. 

Great Britain.* — Employers shall, (a) provide respira- 
tors and overall suits for the use of all persons employed 
in cleaning the flues, and take means to see that same are 
used; (b) they shall arrange that no person be allowed to 
remain at work more than two hours at a time in a flue 
(a rest of half an hour before re-entering will be deemed 
sufficient) ; (c) they shall provide sufficient bath accommo- 
dations for all persons employed in cleaning flues, and 
everyone so employed shall take a bath before leaving the 
works; (d) they shall provide washing conveniences, with 
a sufficient supply of hot and cold water, soap, nailbrushes, 
and towels. 

In cases where co-operation of the workers is required 
for carrying out the foregoing rules, and where such co- 
operation is not given, the workers shall be held liable 
under Section 2, 'Workshop Act of 1891, which is as fol- 
lows: "If any person who is bound to observe any spe- 
cial rules established for any factory or workshop (in 
which is included smelters) under this act, acts in con- 
travention of, or fails to comply with, any such special 
ride, he shall be liable on summary conviction to a fine 
not exceeding £2." 

Germany? — The main requirements in this country are: 
1. The rooms wherein lead is roasted, raked out, and 
worked, where lead containing silver is ladled off, where 
oxides and other compounds are made * * *, also where 
zinc scum is distilled, must be spacious, high, and so ar- 
ranged that there is sufficient and continuous change of 
air; (b) the rooms must be provided with a level and 
solid floor, permitting of an easy removal of dust by wet 
methods; (c) the walls must have a smooth surface so as 
to prevent accumulation of dust, and must be washed or 
whitewashed at least once a year. In roasting sheds with 
wooden walls this regulation is not enforced. 

^Bulletin de V Inspection du Travail, 1906. 
^'Metallurgy of Zinc and Cadmium,' page 631. 
'Regulations and Special Rules in Force, January 1908. 
sRegulations of the Imperial Chancellor Concerning Erec- 
tion and Management of Lead Smelting Works, June 16, 1905. 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



11 



2. For workmen engaged at the furnaces and melting- 
pots there must be a sufficient supply of drinking water 
in a convenient and completely protected place. In the 
neighborhood of the furnace there must be arrangements 
for spraying the ground. The floors of all places men- 
tioned in rule 1 are to be cleaned once a day in the 
moist state. 

3. Lead ore and smelted products containing lead, if not 
moist, are to be crushed in machinery so constructed that 
dust will, as far as possible, be prevented entering the 
work-rooms. This does not apply to the roasted material 
removed from the converters. Sacks in which lead ore 
or lead products have been packed must only be cleaned 
in closed apparatus. 

4. Materials containing lead oxides, if dusty, must be 
moistened before being mixed with other materials pre- 
paratory to being placed in the furnace. 

5. Dust, gases, and fumes escaping from furnaces, con- 
verters, slag spouts, and receiving pots, from sump, slag, 
slag-cars, slag heaps, and from the glowing remains re- 
moved from the furnaces, as well as from the refining pots, 
must be caught near their point of origin and removed. 
Flues and furnaces must be properly cooled and ventilated 
before workmen enter. 

France? — The principal regulations may be summarized 
as below : 

I. Lead-melting pots must be placed in airy places separ- 
ated from other workshops. Hoods or any other efficient 
means for the removal of fumes shall be installed, above 
the sink containing the molten lead or slag in the metal- 
lurgy of lead. 

3. All work which deals with oxides and other lead com- 
pounds liable to give off dust must be carried on as far 
as possible in the moist state. If this is impracticable in 
the presence of water or other liquid, the work must be 
carried on mechanically in a closed and air-tight compart- 
ment. 

(Where one or other of the regulations in article 1 
and 3 cannot be carried out, the work in question must 
be done under a powerful exhaust installed in such man- 
ner that the harmful products are arrested by suitably 
placed appliances. Finally, if none of these methods can 
be adopted, the workmen must wear respirators.) 

8. The introduction of food or drink into the workrooms 
is forbidden. 

9. Employers are obliged to place at the disposal of 
the employees, and to gratuitously maintain, overalls and 
other clothing to be used exclusively in the work; also 
gloves and respirators. 

10. In a part of the factory separated from the work- 
shops there must be for the use of workmen exposed to 
dust or any other lead emanations, a well kept dressing 
and washing room, provided with taps and basins in suffi- 
cient number, and with an abundant supply of water as 
well as soap, and for each workman one towel, the latter 
to be renewed at least once a week. 

II. A warm bath or spray shall be at the disposal of 
workmen exposed to dust or other lead emanations, once 
a week. At the close of each day's work an opportunity 
of taking a warm bath, or of having a warm spray, must 
be offered to every workman occupied in emptying or 
cleaning flues or dust-chambers, err repairing of furnaces, 
in lead smelters. 

12. Employers must post, in readily accessible places, 
a copy of the regulations, which impose upon the work- 
men the following requirements : They must make use of 
the tools, gloves, respirators, and working overalls pro- 
vided at the expense of the employer; and must not intro- 
duce into the workshop either food or drink. They must 
take care that before each meal their mouth, hands, and 
nostrils are properly cleansed, and that they take weekly 
or daily baths stated in No. 11. 

Conclusion 

From the foregoing brief outline, the need of special 

"Decree of April 1908, Prescribing Special Regulations for 
the Hygiene of Industries in Which Workmen Are Exposed 
to Plumbism. 



precaution for the protection of those employed by lead- 
mining and smelting industries is apparent. The solution 
of the problem is simple. Workmen should invariably be 
informed concerning the peculiar risks they run. The 
lead mining and smelting industries in America should 
be made as safe as are the same industries in European 
countries. 



Clarifying Cyanide Solutions 



The following notes on an experiment relating to the 
clarifying of cyanide solutions are given by Chester Stei- 
nem, Mogollon, New Mexico, in the South African Mining 
Journal. The disadvantages of the proposed method are 
obvious. 

Probably the worst two zinc-box troubles are: (1) the 
deposition of fine ore particles on the zinc from cloudy 
solutions, and (2) the deposition of a zinc slime from com- 
plex zinc compounds in solution. The principal effect of 
the latter is to coat the zinc-shavings, making them ineffi- 
cient, while the former not only has this effect, but makes 
much 'short zinc' and a low-grade precipitate. This low- 
grade precipitate necessitates more time and flux in melt- 
ing. To clarify cyanide solutions, it has occurred to me 
that the process long used for purifying city water might 
be useful. This method consists essentially in adding a 
small quantity of potash alum in solution to the water to 
be purified, which coagulates the impurities in the water. 
The mixture is run through a settling-basin where the 
coagulated portion is settled out. The water is then put 
through a special type of sand-filter to finish the work. 
The process is used on river water containing the minutest 
clay slime and the water is so purified as to be clear and 
practically free from bacteria. H. W. Miller and myself 
made experiments to determine the effect of the alum on 
cyanide solution. First a sample of muddy 'box-heads' 
running about $2.25 in gold and silver, was treated with 
alum (about 2 lb. per ton, which is a comparatively large 
quantity). A voluminous precipitate immediately appeared 
and a slight odor of HCN was noticeable. The precipitate 
was allowed to settle. In less than an hour all had set- 
tled except a small quantity which floated on the sur- 
face. After settling, the solution was titrated for cya- 
nide and was found to be slightly higher than the original. 
The settled precipitate gave a good test for zinc. The solu- 
tion was assayed for gold and silver and was found to 
have lost about 5c. per ton. Not having facilities for a 
quantitative analysis at hand, the relative amount of zinc 
precipitate was not determined. Considering the results, 
the following suggests itself for mill work: A long nar- 
row reservoir containing baffle walls similar to those in 
zinc-boxes. If the final compartment is filled with oakum, 
excelsior, or a similar material, the sand-filter can prob- 
ably be dispensed with. The other compartments should 
have facilities for drawing off the coagulated material at 
the bottom. An extra set of zinc-boxes would do for ex- 
periment. Such a scheme, while it would probably require 
considerable storage space, would be cheap, as alum costs 
but $1.75 per 100 pounds. 

Asbestos properties situated twenty miles southwest of 
Llano, Texas, are being extensively developed. The out- 
crop is 250 ft. wide and 1600 ft. long. It was located a 
few years ago by N. J. Badu, who has made an exhaustive 
exploration of this region. Mr. Badu recently sold the 
deposit to the National Asbestos Co. of Chicago, and it 
is this concern which is now arranging to exploit the 
property. It is claimed that the surface mineral shows that 
it belongs to the chrysolite variety of asbestos, which is 
in great demand for commercial purposes. The other vari- 
ety known to the trade is amphibole and comes chiefly 
from Italy. 

Panama has only one mine in operation, that of the 
Darien Gold Mining Co., but altogether 169 mines, includ- 
ing gold, silver, copper, iron, sulphur, asbestos, and lime- 
stone have been denounced in the republic. 



12 



MINING AND SCIENTIFIC PRESS 



July C). 1912 



Flotation of Minerals 



By Kexneth A. Mickle 

"The various flotation processes which are now being so 
largely used for separating metallic sulphides from sul- 
phide ores depend upon differential gas and liquid attach- 
ment phenomena. The sulphides are floated on aqueous 
solutions as a sort of scum or froth by the agency of either 
gases alone or by oily substances. 

In a paper by Lord Rayleigh it was shown that the 
presence of small amounts of various impurities in water 
materially affected its frothing properties. Pure water, 
on being vigorously agitated with air, shows very little 
tendency to produce a froth. This tendency is much in- 
creased by the addition of small amounts of some sub- 
stances, as saponine and acetic acid. These include not 
only substances which are soluble in water, such as saponine 
and acetic acid, but substances which are insoluble in water, 
such as various oils and certain finely divided solid sub- 
stances. Without doubt liquid cohesion and attachment 
effects are important factors in determining froth-producing 
variation, but it seems apparent that gas attachment is 
the chief factor, and a comparison of the various propor- 
tions of froth produced would therefore afford an approxi- 
mate measurement of the attachment of air to water and 
to various aqueous solutions and mixtures. A series of ex- 
periments has permitted the ranging of the common ma- 
terials in order according to their power in this particular. 

The effect of oils in protecting minerals from being wet- 
ted by water, owing to the oiling of their surfaces, and 
also the affinity of oils for metals and many metallic sub- 
stances has long been known. As no accurate method of 
measuring this effect has suggested itself, and as minerals 
may occur in many different forms with varying physical 
characters, no attempt is made here to make a definite 
classification on this basis. Tests were, however, earned 
out to show the amount of oil absorbed by minerals, and 
the character of the resulting product. 

Mixtures of the mineral to be tested, water, and oil 
(with and without a small quantity of acid) in definite 
quantities were taken and agitated thoroughly till the 
character of the product became constant. 

The results of these tests showed that while there are 
undoubtedly differences in the degree of attraction between 
a given sulphide and various oils, and between various sul- 
phides and a given oil. the general behavior between vari- 
ous sulphides and various oils in the presence of water is 
practically the same in character, that is, all sulphides will 
become attached to all oils in preference to water. With 
the silicates and other rock minerals usually found in the 
gangue material of ores, the character of the product 
varies with different minerals. From an elaborate series 
of tests, the following was deduced. 

Adsorption of Oil in Water. — 1. Finely divided sulphides 
when suspended in water will adsorb varying amounts of 
oil. Large proportions of oil tend to form magma, and 
smaller proportions plastic masses and coherent aggregates. 
The character of these oily magmas depends upon the 
amount and the character of the oil used. Thick oils give 
viscous coherent products, and thin oils give less coherent 
products. Oily magmas containing considerable propor- 
tions of oil will entangle and hold gaseous bubbles with a 
degree of persistence which depends on the viscosity of the 
oil. Sulphides having an adsorption of about 5% of oil 
tend to attach gaseous bubbles, and this tendency increases 
as the proportion of oil diminishes, until a certain limit is 
reached, which is 0.5$ or thereabouts. 

2. The adsorption is more pronounced with sulphides 
than with such minerals as quartz, feldspar, and most of the 
acidic rocky minerals forming the gangue of ores. 

3. Some of the silicates and other gangue forming min- 
erals will adsorb oils in a manner approaching that of the 

'Abstract from a paper read before the Royal Society of 
Victoria and reported in the Australian Mining Standard. 



sulphides; for example, rhodonite, garnet, magnetite, and 
calcite. 

4. As shown by the tests on sized minerals, the amount 
of oil adsorbed depends upon the extent of surface exposed. 

Adsorption in Acidulated Sohttiorts. — 1. The sulphides 
will adsorb oil in the same manner to form oily magma, 
plastic masses, and coherent aggregations, as in the case of 
water and oil without acid. The amount depends on the 
extent of surface exposed by the minerals, as previously. 

2. The gangue minerals will not adsorb oils to nearly the 
same extent as when no acid is present. 

3. The maximum amount of oil adsorbed by sulphides in 
a stable manner when crushed to pass through an 80-mesh 
sieve (linear inch) is in the neighborhood of 10 to 15% of 
their weight. This is shown by the absence of excess of 
oil on the surface of the solution in the above tests when 
the percentage of oil to mineral was at or near these values. 
The tendency of the plastic magma to break up and form 
less coherent aggregates at this point also indicates this 
limit of true adsorption. 

These determinations permit of the conclusion that when 
finely divided metallic sulphides are vigorously agitated 
with an excess of water and a small proportion of oil, the 
oil is adsorbed by the sulphide particles. As shown by tests 
on the sized material, the quantity of oil adsorbed depends 
upon the extent of the surface exposed. This being so, it 
seems safe to assume that the adsorbed oil is evenly dis- 
tributed over the surface of the particles. When the quan- 
tity of oil adsorbed is very small, the general appearance 
of the sulphide does not differ from that of unoiled par- 
ticles. With a sulphide such as galena, which has been 
crushed to pass through an 80-mesh sieve, this point of ap- 
parent difference is reached when the proportion of oil ad- 
sorl>ed (in the case of oleic acid) is between 0.05 and 0.10%. 
Even with these small proportions, various physical tests 
indicate that the particles are oiled. This can be shown 
by their aversion to being wetted by water, and by the fact 
that the odor of decomposed oil is noticed on heating. 

Such a quantity as 0.1% cannot be separated by squeez- 
ing, centrifugal force or other mechanical means, and any 
such quantity of adsorbed oil as 0.1% may be regarded as a 
true adsorption .of the oil by the mineral. When more oil 
is added, it is probable that a secondary envelope of oil 
becomes attached to the primary film. When this oil is thin, 
there is still the attraction of the oil for the sulphide, but 
as the film becomes thicker the subsequent overlapping en- 
velopes of oil are held by the attachment of one oil film for 
another. These overlapping films are less persistently held 
than the primary films, and some of the oil can be sep- 
arated mechanically, as by pressure or centrifugal force. 
The point at which the s eco ndary film is thickest and still 
stable is represented in the above tests, when no excess of 
oil shows on the surface of the solution. 

The various stages between the primary adsorption and 
the putty-like product represent the gradual thickening of 
the secondary oil envelope. The strength of the attachment 
of the secondary film depends largely on the cohesion of 
the oil itself, the more viscous oils forming more coherent 
products and the thinner oils less coherent products. 

In the test on sized galena crushed to pass an 80-mesh 
sieve but retained on a 20-mesh sieve, it was found that all 
the oil (5 gm. oleic acid) was adsorbed by 00 gm. of the 
galena. From these data, the approximate thickness of the 
oil film at this stage in the adsorption can be calculated. 
Assuming that the average size of the particles is 0.25 cm., 
and that the particles are cubes, the thickness of the oil 
film would be 0.003 centimetres. 

Diagrammatic representation of oil adsorption shows the 
gradual thickening of the secondary film of oil from the 
primary adsorption to the oily magma. The oil films around 
the mineral particles show as concentric rings. 

Oil attachments and water attachments present many sim- 
ilarities. A sulphide carrying 2 or 3% oil cannot be de- 
prived of its oil by gravity, centrifugal force, or other 
mechanical means. Similarly in the case of wet sand carry- 
ing a like proportion of water, the water cannot be 
readily separated mechanically. In both cases with the 



July 6, 1912 



r 

MINING AND SCIENTIFIC PRESS 



13 



small attachments the laws of gravity are not obeyed. With 
larger proportions the oil and water will separate out by 
gravity. 

There is also a similarity between the gradual wetting of 
a finely crushed mineral with water, from the feebly co- 
herent damp mineral to the thick coherent pulp, and the 
feebly coherent sulphide with a small proportion of oil to 
the various stages of oily magma. Whether the mineral 
particles are feebly coherent, due to the presence of a small 
quantity of water, or when under the surface of a solution 
the mineral particles are feebly coherent, due to the pres- 
ence of a small quantity of oil, in both cases the interstitial 
spaces remain unfilled, in the first case with water and in 
the second with oil. 

In the presence of excess of water and when the mineral 
has adsorbed as much oil as it will, the interstitial spaces 



the attachment of the air becomes greater after a certain 
time has elapsed. [This is extremely improbable; doubtless 
dust collects upon the metal. — Ed.] 

3. That the oil probably acts as an agent by which the 
gas bubbles are more tenaciously attached, but that it is 
the mineral itself which in the first place determines the 
gas attachment. 

4. That the acid treatment tends to prevent gas attach- 
ment in the case of the gangue particles, while it does not to 
the same extent similarly prevent gas attachment in the 
case of the sulphides. 

5. That attachments of carbon dioxide still cling to the 
particles of sulphide on settling beneath the surface of the 
liquid, and after the visible gas bubbles forming the scum 
have become disengaged. The analysis of the disengaged gas 
shows that it is mainly composed of nitrogen. Assuming 




become filled with the respective liquids to form coherent 
pulp or magma. 

Mineral particles adsorb gases to an extent not gener- 
ally suspected, and they also retain the gas adsorptions 
with such a persistence that they can neither be easily 
separated by mechanical means nor much affected by 
gravity and gas expansion. It has been shown that in the 
case of adsorption consisting of a mixture of gases, the 
respective gases may be separated fractionally, the law of 
gaseous diffusion apparently not being obeyed. With the 
view to further investigating these gas adsorption phe- 
nomena, a series of experiments were conducted that led 
to the following conclusions: 

1. That the persistence of the attachment of the gas bub- 
bles is increased when the surface is contaminated with 
some oily substance. 

2. That perfectly cleaned needles and iron wire will float 
on the surface of distilled water under the following con- 
ditions: (a) if the water is allowed to stand for some time 
in contact with the air, (b) if the needles and wire are 
allowed to remain exposed to the air for sufficient time. 
In the first case, probably a layer of fine dust collects on 
the surface of the water, and in the second case probably 



I (lint a proportion of oxygen that would give with the nitro- 
gen found a mixture corresponding to atmospheric air, was 
originally present, the fact that the gas evolved from the 
sulphides themselves when subjected to reduced pressure 
is carbon dioxide, shows that the latter is attached more 
persistently than is the air. 

A series of measurements and analyses of gases evolved 
from minerals showed that from the sulphides and ma- 
terial containing sulphides, such as the Broken Hill tailing 
and slime, as a rule more gas was obtained than from the 
calcite and quartz. This gas consisted mainly of carbon 
dioxide. The residual gas, after absorbing the carbon di- 
oxide and oxygen, was largely in excess of the proportion 
of nitrogen in atmospheric air, and may contain hydrogen 
or an excess of argon. That the carbon dioxide in these 
tests is not derived from the decomposition of carbonates 
during the experiment is shown by the negative results 
shown by cerussite and calcite. 

These results indicate that there is apparently a concen- 
tration or condensation of gas consisting mainly of carbon 
dioxide on the surface of the sulphides, and to a much less 
extent on the other minerals tried. This gas is held per- 
sistently, and does not obey the laws of gaseous diffusion, 



14 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



and may therefore be present in the liquid form. This is 
indicated by the fact that it is the more easily condensed 
gas, that is the more persistently attached. The fact that 
finely divided material in the form of slime will attach more 
gas than similar material in a coarser state indicates that 
the action is a surface action. It may be akin to the action 
of charcoal, which will absorb large volumes of the more 
readily condensible gases as carbon dioxide, sulphur dioxide, 
and ammonia. It is known that water vapor will cling 
most persistently to some surfaces even at high tempera- 
tures. 

It had previously been found that carbon dioxide was 
obtained from all the sulphides tried by the aid of heat and 
exhaustion in the presence of water. It is probable that 
the gas film can only be expanded for removal in appre- 
ciable quantities in the presence of water, and that ex- 
haustion in the dry state does not remove all the gas pres- 
ent. The film can be removed by solvents. The thickness 
of the film is probably analogous to the thickness of ad- 
sorbed oil and adsorbed water films. 

When an excess of oil is attached to a sulphide it can be 
separated to some extent by stirring or by pressure. Simi- 
larly, if a sulphide flotation product which was floated by 
gas is stirred, a large proportion of the excess gas is given 
off. This can be seen by the larger bubbles bursting, and the 
shrinkage in volume of the flotation product on standing. 
If a flash is completely filled with some of the flotation 
product, and the flask is then stoppered, on standing, it will 
be noticed that the scum occupies a lesser volume, partly 
due to cooling and partly to the bursting of the bubbles and 
disengagement of the gases. For instance, in a large Win- 
chester quart bottle originally completely filled with the 
flotation product, on standing the sulphides only occupied 
about two inches on the bottom of the bottle. The remainder 
of the space (six inches), except for five inches of solution, 
was occupied by the disengaged gases. 

The different stages of oil and gas adsorption are an- 
alogous to a certain extent. In the test of the latter, where 
there is insufficient gas to buoy the mineral to the surface, 
but aggregates are formed (such as are brought about by 
weak chlorine and nitric acid solutions in the cold), there 
is a similarity to the aggregation stage in oil adsorptions, 
where a thin secondary film of oil is attached to the primary 
film. In the case of gaseous aggregations, flotation can be 
brought about by increasing the amount of attached gas; 
that is, by adding a saturated solution of carbon dioxide, 
the bubbles of the latter gas becoming attached to the 
aggregates, and buoy them to the surface. 

Thus the stages in producing flotation of a sulphide by 
oil without the aid of gas are: (1) primary adsorption film; 

(2) secondary attachments, which will form aggregates; (3) 
oily magma formed by excess attachments; (4) oil sufficient 
to bring about the production of magma of such a specific 
gravity as will float in water. 

Similarly, the stages gone through in bringing about the 
flotation of a sulphide with gas are: (1) primary adsorp- 
tion film; (2) aggregates formed by secondary attachments; 

(3) fairly stable aggregates which float by the aid of heat 
or reduced pressure; (4) a scum or froth containing an ex- 
cess of gas, which is mostly disengaged by agitation, after 
buoying the agsregates to the surface. 

The results of the experiments show that (1) without the 
addition of acid the flotation produced by oil contains much 
gangue material, and (2) that the addition of acid up to 
a certain point decreases the amount of gangue in the 
flotation product. 



According to Engineering, a London firm mainly con- 
cerned with copper-plating wood applies the name 'kup- 
ronizing' to the process it employs. In the plating of 
wooden hand-rails, the wooden core is first impregnated 
with a preservative material and then flashed with either 
plumbago or a metallic salt. The actual copper deposition 
is then carried out in a bath in the usual manner. It is 
the present practice to deposit a layer about '/„ in. thick. 
Iron window-frames and iron pump-rams are now kup- 
ronized. 



Mining at Cripple Creek 



By William H. Storms 

Mining methods in the Cripple Creek district are not 
unlike those generally in use throughout the metal-mining 
regions of the West. The veins are stoped with the use 
of as little timber as possible, and many large open stopes 
are the result, as well as caves, which in numerous in- 
stances have extended to the surface. Some of the ground 
stands very well, and some of it caves readily, but it has 
been the practice, I may say the necessity, to hoist to 
the surface nearly all the rock broken underground, so 
that as little of the valuable mineral be lost as possible. 
The practice in each mine is determined by the existing 
conditions. The value of the ore is chiefly in gold, either 
metallic or occurring as some telluride of gold, generally 
sylvan ite or calaverite, and as a rule it occurs in the 
softer parts of the rock, in clay seams, and on the frac- 
ture joints and cleavage planes of the rock. The miners 
are therefore careful to send all fine material to the sur- 
face, as well as every pound of coarse rock broken show- 
ing any indication of value, that nothing may be over- 
looked or wasted. As a result of these conditions, the 
cost of mining per ton of ore eventually recovered is high. 
One thin? that attracted my attention was the unusual 
size of the ore-chutes connecting the main gangways with 
the stopes. These are seldom less than 3 ft. wide, and 
are often as much as 4 ft., and constructed of 3-in. plank. 
The object of this is that large masses coming to the 
chute may be block-holed and blasted in the chutes with- 
out serious injury to them. This is common practice in 
the Cripple Creek district, though I have seldom seen it 
elsewhere. The block-holing is done with an air-hammer 
drill. The greater part of the large ore masses blasted 
down in the stope is broken by rock hammers, or by 
block-holing, but large pieces are often buried beneath tons 
of the broken debris and these work down to the chutes 
as the ore is drawn off, and when exposed in a chute are 
broken as described. 

At Cripple Creek an important factor in both the min- 
ing and the metallurgy of the ore is concentration. This 
commences in the mine, whenever possible, or expedient, 
by a rough hand-sorting of the rock broken in the vein. 
Upon reaching the surface the ore usually goes to a crusher 
and then to a washer, commonly a revolving trommel, 
occasionally a shaking-screen, provided with jets of water 
under pressure. The mines are mostly wet, and the ore 
comes up covered with clay and mud, so that it is often 
impossible to distinguish it before a clean surface is pre- 
sented, and this is obtained by spraying with water in 
the revolving trommel, or on the shaking screen. From 
the washer the coarser pieces of ore pour in a continuous 
stream upon a belt-conveyor, along which are stationed 
a number of men or boys who pick out either the ore or 
the waste, depending upon which occurs in greater abund- 
ance; this practice varying at the different mines accord- 
ing to conditions. The fine material passing through the 
trommels is generally the richest portion ; the hand-sorted 
rock being the next best, the coarse rock in most cases 
goes to the dumps. The sorted ore goes by car to bins 
at the nearest railroad siding, or is sent down in buckets 
on an aerial tramway, as at the Cresson Consolidated. 
The railways haul the ore either to the mills near Colorado 
Springs or to the smelters situated at various points. 



Coke is made in Colorado, New Mexico, and Utah. Colo- 
rado's coal made into coke in 1911, according to the U. S. 
Geological Survey, amounted to 1,424,251 short tons, or 
14% of the total output of the 1 state. New Mexico con- 
sumed 767,108 short tons, or 25% of the total production 
of the state, in the manufacture of coke, and Utah 381,696 
short tons,- or 15% of the total output. The total quantity 
of coal consumed in the manufacture of coke at the mines 
of the Rocky Mountain states was 2,573,055 short tons, a 
little less than 10% of the total production. 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



L5 



Mother Lode of the Klondike 



By Harold French 

In the early years of the Klondike excitement every 
'sour dough' and 'eheechaco' had a guess coming' as to how 
the gold came to get into the gravel. Some practical pros- 
pectors, pointing to the coarseness of certain nuggets, in- 
sisted that they were melted by volcanoes and blown all 
over the surrounding country. One eminent savant sagely 
stated for publication that he had discovered indisputable 
evidence to prove that in the glacial epoch, t he valleys of 
the Klondike and Indian rivers were covered by a vast 
lake, into which rivers of ice debouched, and that mighty 
bergs, bearing countless tons of auriferous rock, turned 
turtle and deposited their precious cargoes in the bottom 
of the lake. 

Most California miners, accustomed to the conditions of 
the Golden State, were positive that these rich gravels 
could be traced to a belt of rich quartz veins, which, as in 
the Sierras, they would call the Mother Lode. Fabulous 
fortunes are awaited the lucky prospectors who located 
these exiles from Sunland. When rich pay-dirt was found 
high on the benches of French bill and along the courses 
of the old channels of Bonanza, Hunker, and Dominion 
creeks during the winter of 1898-9, the source of the Klon- 
dike's gold was deemed near at hand. Numerous quartz 
locations were made on the neighboring ridges. Almost 
every stranded boulder was staked and re-staked by pencil 
and hatched prospectors. Here and there stringers of 
pearly white or rose-pink quartz, barren as barnacles, pro- 
truded from the prevailing country-rock, a mica schist. 
With sublime faith these faint indications of something 
better below were proclaimed to be the outcroppings of the 
Mother Lode of the Klondike. 

During 1899 quartz prospecting was in full blast, and in 
thai year I had the pleasure of running an assay office in 
Dawson for the Alaska Commercial Co. Part of my con- 
tract was to keep a lookout for a bona fide quartz mine. 
While most of my time was taken up in melting and assay- 
ing the company's bullion, I was permitted to do a certain 
amount of custom assaying of ores and to 'mush' out and in- 
spect sundry coyote holes and prospective Comstocks and 
Witwatersrands. [mpecunious prospectors Hocked to the 
office with samples which they hoped I would assay 'on a 
lay.' Others paid their half ounce of dust for gold and silver 
determinations which dashed down their hopes, for the 
average of hundreds of ore assays was about $1.50 per ton. 
Disseminated throughout the country rock were tantalizing 
veinlets, or fahlbcmds, containing small amounts of gold. 
That the erosion and stream-transportation of vast quanti- 
ties of this country rock resulted in the concentration of 
this gold became the generally accepted theory, but the ex- 
istence of a Mother Lode seemed highly probable. 

Among my clients was a mining promoter of the old 
school, a certain Colonel T. His credit was so goo,] that I 
gladly did scores of scorifieations and fusions on account. 
Gradually the account grew into a half partnership. I had 
hitched my wagon to a star. That startling developments 
would follow, I never doubted. He knew the West like a 
great stone book. He had studied the strata of almost every 
ridge of the Rockies, and had memorized the history of 
every mining camp. His genial optimism was at times 
most intoxicating. Certainly he and I were hiking along 
the high road to Bonanza and El Dorado. 

One August night, the twentieth of the month, I was 
lounging on the porch of the company's hotel, with all the 
optimism of an after-dinner mood, when a trail-worn 
'musher,' just in from the creeks, paused at the gate. Over 
his back he carried a sack that half-concealed his identity, 
but a familiar finger summoned me, and I awoke to the 
realization that this was the Colonel. Tired as he was, his 
face was radiant. "My boy," he greeted me, "twenty's my 
lucky number. Tolay's the 20th, and this afternoon I've 
walked 20 miles. The stuff I have here is from a ledge 20 



ft. wide, 20 ft. down. I want you, first of all, to start up 
your furnace, buck down some samples as quick as you 
can, put 'em through tonight, so we can get the returns as 
soon as possible. All I need is a few hours sleep, and in 
the morning I'll mush right out and locate some extensions 
along the strike of the ledge." 

I opened the bag of samples and my eye was caught by 
the lustre of metallic particles disseminated through the 
mass. Steel-gray graphic crystals studded the quartz. 
Pointing to these, the Colonel shouted : "Tellurides, don't 
you know 'em when you see 'em ? Why that's pure sylvan- 
ite, the stuff that made Cripple Creek the greatest gold 
camp in America. I've seen little seams like knife-blades 
of these here tellurides that ran one-quarter solid gold. 
Hut out on the divide between Hunker and upper Bonanza 
the ledge is, think of it, 20 ft. wide, and 20's my lucky 
number." I wasn't much over 20 myself, and I began to 
think that 20 was my lucky number, too. "I think I had 
better test this before I fire up," I ventured. "Fire up 
your furnace fust, and test afterwards," the Colonel com- 
manded. I obeyed. The samples were readily pulverized on 
the bucking board, and in a few minutes were spread on 
scorifiers and placed in the muffle. Then I turned my at- 
tention to testing the powder with sulphuric acid on a por- 
celain plate. It gave the unmistakable pink tinge of tel- 
lurium. I told the Colonel that he was right, that he had 
surely struck telluride ore, and off he went, rejoicing, to 
sleep — perchance to dream of golden rewards. 

Meanwhile, as the furnace glowed, I applied a knife to 
a larger particle of the steel-gray metal. It was soft, softer 
than copper, and under 2 in the scale of hardness. In the 
muffle curling clouds arose from the scorifiers, a mingling 
of sulphurous and tellurous vapors. The 'bullseye' winked 
at me and I withdrew the molten charges, poured the lead 
alloy into molds, and, after cooling, hammered out some 
rather brittle buttons and placed them on cupels and awaited 
further results. 

Without, the busy life of this boom mining camp kept up 
its clamor. The ceaseless music of 'A Georgia Camp- 
Meeting' rang out from a neighboring dance hall in riotous 
reiteration. At intervals the howling of hurt malamutes, 
wailing over their wounds, bespoke the breaking up of a 
street light, while, thump, thump, thump, over the board 
walk sounded the beats of gum-booted feet. The shadows 
of returning winter darkened the window at ten o'clock, so 
that I could with difficulty watch operations in the cherry- 
red muffle. Suddenly, the buttons in the cupel, one by one, 
seemed to brighten, and in the dim light I removed them, 
and t y unspeakable excitement, I found their size suffi- 
cient to account for at least $10,000 in gold and silver in 
every tone of this bonanza i-ock. 

Needless to say, I could not sleep; I could hardly wait 
until three in the morning, when, with stronger light I 
would part the buttons and compute their exact composi- 
tion. Somehow, they seemed more dull at early dawn than 
they had appeared a few hours before. It occurred to me 
that possibly the eupellation was incomplete. I replenished 
the fuel of the furnace and, wrapping the buttons with lead 
foil, replaced them when the muffle had reached its proper 
heat. Then followed a disheartening, harrowing ordeal. 
At intervals I saw the smoking buttons dwindle away to 
half their size, to a quarter, then, as they steadily dimin- 
ished, I realized the sickening truth, that in the poor light 
of the late evening the buttons had simply chilled. Gradu- 
ally my hopes volatilized, and at five in the morning, as 
the cooks began to raise a racket with their pans in the 
company's kitchen, I saw, in each of the cupels, a tiny 
sparkling bead. Three of these I combined and weighed, 
and found that this wonderful telluride ore only contained 
about a dollar per ton in silver, and only the faintest trace 
of gold. A few tests confirmed the fact that, while this ore 
contained tellurides, they were only sulpho-tellurides of 
lead and antimony, corresponding to a compound of galena 
and stibnite. When the Colonel arrived and I broke the 
news to him, his only reply was to grab the samples and 
rush to a rival assayer, who told me the following evening 
how he had received some fairly good antimony ore, but 



16 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



couldn't recommend it as commercially valuable. As my 
client, the discoverer of the Mother Lode of the Klondike, 
turned his back on me, the breakfast bell was ringing its 
cheerful summons to all. save me, for my appetite had 
gone a glimmering as had my midsummer night's dream of 
fortune. 

The Action of Mineral Sulphates and 
Arsenates on Cyanide Solutions 

By Andrew F. Crosse 

*It has long been known that both sulphate of magnesia 
and sulphate of lime decompose cyanide solutions. The 
mineral kieserite is not rare, and has the composition 
MgS0 4 -f- IPO, and according to 'Comey's Dictionary of 
Chemical Solubilities,' is but slowly dissolved in cold water. 
Hydraled sulphate of calcium or gypsum is also common, 
but it interests us more because sulphate of calcium is 
produced when the acidity in tailing and slime is neu- 
tralized with lime, and I have also found alumina taken 
up in cyanide solutions, so that probably some aluminum 
sulphate or double sulphate was in the ore. The first 
point I would like to mention is that an ordinary analysis 
of a mineral or sample of the ore to be treated by the 
cyanide process is nearly valueless. 

For instance, take a common example — a certain ore 
contains iron, sulphur, magnesium, and other elements, ac- 
cording to the analysis. This analysis is no help to the 
cyanide manager. What he wants to know is, what will 
take place when the finely crushed ore comes in contact 
with an ordinary cyanide solution? The Mount Morgan 
ore near Barberton is a good example. I have seen an- 
alyses of this ore, but as far as'I can remember, none of 
them showed any sulphate of magnesium ; magnesia was 
mentioned and so was sulphur, and as this ore is highly 
pyritic, I did not think of the presence of sulphate of 
magnesia until 1 began treating the ore. I found on mak- 
ing a preliminary test that the ore, digested in warm 
water, gave a neutral reaction. In my first experiments I 
used an ordinary amount of caustic lime, and found the 
protective alkali gradually disappearing, and eventually 
free HCN was being given off. Then 1 digested some of 
the finely ground ore in warm water, and found magnesium 
sulphate in the solution. T determined the sulphuric an- 
hydride in solution, but I found out in subsequent ex- 
periments that more SO. was taken up when using car- 
bonate of soda solution, or cyanide solution. I consider 
the best method to determine the amount of soluble sul- 
phates present in an ore, is to take 100 gm. of finely 
ground ore and shake it up with 500 e.c. of warm water 
containing say 2 gm. of carbonate of sodium of known 
percentage of Na,CO,. I prefer to leave the mixture all 
night and shake it up again next morning, and then titrate 
the Na.CO, left, taking 50 e.c. of the filtered solution, and 
the amount of carbonate of sodium used per ton can be 
easily calculated. In the case of the Mount Morgan ore 
it was 10 lb. per ton of ore. but the same ore after treat- 
ing with warm water only required 4.4 lb. of Na,C0 3 per 
ton of ore to precipitate the MgCO, and CaCO, from 
the aqueous solution, so that even if the ore were washed, 
it would still decompose a cyanide solution; therefore 
carbonate of sodium is necessary. This is quite an im- 
portant point, for if the sulphates were easily removed 
by water, this would take place during crushing in the 
mill. 

There is a peculiar vein found in the Machavie mine on 
the Black Reef, between Potchefstroom and Klerksdorp. 
The pyrite is in a globular form, and there is a large 
amount of graphite in this ore (the Mount Morgan ore 
also contains graphite). Some of the tailing from that 
mine after washing four times decomposed cyanide of 
potassium (without using protective alkali) at the rate of 
0.04 lb. per ton. The unwashed sand, however, under the 
same treatment, decomposed 3.2 lb. of cyanide of potassium 

*From the Journal of the ('hem. Met. & Min. Soe. of S. A. 



per ton of ore. This ore contained sulphate of magnesium. 

I made a long series of experiments with various pro- 
portions of CaO in solution (lime water) added to a mix- 
ture of equal parts of decinormal pure cyanide of potas- 
sium solution, and decinormal sulphate of magnesia. This 
seemed very nice and simple, and I thought that I should 
get some definite results. There was a time not so very 
long ago when it was imagined that all chemical reactions 
could be nicely expressed in equations, but unfortunately 
the more the mysteries of the physical world are studied 
the more it is found that nature does not arrange things 
to suit preconceived ideas. A nice equation is the fol- 
lowing : 

2KCN + MgSO, -f 2IPO = 2HCN + Mg(OH) 2 + K..SO, 
When equal portions of the decinormal solutions of the 
above salts are mixed, a precipitate of magnesium hydrate 
is formed, and free hydrocyanic acid is given off, but I 
doubt whether the reaction is as complete as the equation 
indicates. I thought that if I added lime-water, gradually 
increasing the amount till no more hydrocyanic acid was 
liberated (when tested by a drop of nitrate of silver solu- 
tion plaeed on the lower side of a glass cover on a beaker) 
I should arrive at some definite result, but BS sulphate of 
calcium was formed, which also dissociates cyanide of 
sodium or potassium, it made things complicated. Again. 
%s more CaO solution was added, weakening the cyanide 
of potassium solution, hydrolysis took place. T found, how- 
ever, that all the magnesium became precipitated as a 
hydrate. Then I also found that free hydrocyanic acid was 
given off, notwithstanding that, using the ordinary test, pro- 
tective alkalinity as CaO was present. I am not satisfied 
that when a cyanide solution containing sulphates of lime 
and magnesia is tested by a nitrate of silver solution, that 
a correct result is obtained. The solutions I used were pure; 
but of course in practice the solutions contain zinc, which 
complicates matters still further. The ordinary practical 
man will shrug his shoulders at all this, but after all, 
the question is how to get over the decomposing action of 
sulphate of magnesium in the cheapest way. Carbonate 
of sodium might be found useful. No caustic soda would 
be formed, as carbonate of magnesium and sulphate of 
sodium would be produced. 

Scorodite. or ferric arsenate, is not a rare mineral. It 
occurs often in conjunction with limonite. a hydrated ferric 
oxide. Probably these minerals, when found together, are 
the result of the oxidation of arsenical pyrite. Scorodite 
has the formula FeAsO, -j- 2H..O. According to 'Comey's 
Dictionary of Chemical Solubilities,' it is insoluble in water, 
but soluble in weak hydrochloric acid. SO. in solution also 
acts on it. When a finely ground mineral containing scoro- 
dite is left in contact with a weak caustic soda solution, 
arsenate of sodium is slowly formed. Cyanide of sodium 
or potassium acts in the same way, this accounts for the 
slow and continuous decomposition of cyanide solutions when 
treating ores containing arsenates. The solution becomes 
charged with arsenates which are reduced in the zinc-box, 
and the precipitated gold carries arsenic, which is not' a 
very pleasant thing to have in the sulphuric acid treatment, 
as arseniuretted hydrogen, a poisonous gas, is evolved. 

I have made many experiments in order to discover a 
method of overcoming the injurious action of arsenates on 
cyanide solutions, and have devised the following method : 
A solution of arsenate of sodium and calcium hydrate gives 
the following reaction : 

2Na,As0 4 + 3CaO + 3H 5 = Ca^AsO,), + GNaOH 

The calcium arsenate is insoluble, and the sodium hydrate 
is regenerated. I ascertained by a series of experiments 
that, using an excess of lime and a small quantity of sodium 
hydrate, all the arsenate that was possible to dissolve was 
taken up by the sodium hydrate, then precipitated as cal- 
cium arsenate, no arsenic being left in the solution. The 
cyanide of sodium was unaffected by this reaction. The 
method I used in order to determine the amount of lime 
required was as follows: 200 gin. of finely powdered ore 
was shaken up every now and then, for seven or eight hours, 
with 200 c.e. of 1% NaOH solution, the amount of NaOH 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



17 



used up being determined in the usual way, and for every 
pound of NaOH required per ton, 0.7 lb. of CaO is re- 
quired in actual practice, but of course some sodium hydrate 
must be present in addition to act as a solvent or carrier. 

For one sample of ore I treated, which contained scoro- 
dite, 13 lb. of NaOH was required per ton of ore; by this 
.simple method 1 prevented the abnormal decomposition of 
the cyanide, and also prevented arsenic going- into solution; 
and by regulating the proper proportion of lime, enough 
was left in solution to cause perfect settlement of the slime. 
It will be evident that ores containing soluble sulphates or 
arsenates may require a large amount of lime per ton in 
order to settle the slime; in the case of arsenates, if there 
is no sodium hydrate added, the sodium in the cyanide will 
effect solution of arsenate, and if only a small amount of 
lime is used, every trace of lime will be precipitated as 
an arsenate of calcium, and the cyanide of sodium will be 
decomposed. Roasted concentrate originally containing 



3-in. DRILL 



A Light Prospecting Drill 



By R. Y. Hanlon 

What I consider to be an excellent prospecting drill 
for deposits not exceeding a depth of 50 ft. is in extensive 
use in Australasia and the Philippine Islands. The drill, 
known as the 3-in. New Zealand, is a light compact hand 
machine, requiring six men to operate it; four upon the 
platform and two revolving the tubes. It consists of 3 1 /k- 
in. flush-joint tubing in 5-ft. lengths, 1^4-in. squared rods 
fitted with %-in. straight threads, platform of lumber, and 
clamps for arranging same upon the tubes, together with 
the usual complement of drill, auger, and pump. The 
pump is usually made 5 ft. long and fits the tubes snugly. 
It is equipped with a thin chilled cutting edge and a 
large metal check-valve ground to a close seat. This 



GOLD 0.06 per Kg . 



Depth 1 2 3 4 5 6 7 8 9 10 mg, 

10 03.30 06.60 09.90 15.20 16.50 19.80 23.10 26.40 29.70 33.0 

11 02.90 05.80 08.70 11.60 14.50 17.40 20.30 23.20 26.10 29.0 

12 02.75 05.50 08.24 11.00 15.74 16.48 19.20 22>;00 24.72 27.5 

13 02.54 05.08 07.62 10.16 12.66 14.24 16.70 20.32 22.82" 25.4 

14 02.34 04.68 07.02 09.36 11.76 14.04 16.40 18.72 21.08 25.4 

15 02.20 04.40 06.60 08.80 11.00 13.20 15.40 17.60 19.80 22.0 

16 02.05 04.10 06.14 08.20 10.24 12.28 14.34 16.40 18.44 20.5 

17 01.94 03.98 05.84 07.76 09.72 11.68 15.82 15.52 17.50 19.4 

18 01.83 03.76 05.54 07.32 09.20 11.08 12.84 14.64 16.48 18.3 

19 01.74 05.47 05.18 06.94 08.66 10.56 12.06 15.80 15.62 17.4 

20 01.64 05.28 04.92 06.56 08.16 09.84 11.52 15.12 14.72 16.4 

21 01.56 05.12 04.70 06.24 07.82 09.40 10.98 12.48 14.02 15.6 

22 01.45 02.90 04.54 05.80 07.18 08.68 10.12 11.60 12.98 14.5 

23 01.42 02.84 04.28 05.68 07.08 08.56 09.98 11.56 12.80 14.2 

24 01.57 02.74 04.12 05.48 06.86 08.24 09.58 10.96 12.36 13.7 

25 01.32 02.64 03.96 05.28 06.68 07.92 09.26 10.56 11.86 13.2 

26 01.26 02.52 03.80 05.04 06.34 07.60 08.86 10.08 11.38 12.6 

27 01.22 02.44 03.68 04.88 06.12 07.56 08.62 09.76 10.98 12.2 

28 01.17 02.52 05.52 04.64 05.84 07.04 08.18 09.58 10.54 11.7 

29 01.14 02.28 05.42 04.56 05.78 06.84 07.94 09.12 10.50 11.4 
50 01.10 02.20 05.50 04.40 05.50 06.60 07.70 08.80 09.80 11.0 

31 01.07 02.14 05.20 04.38 05.34 06.40 07.46 08.56 09.68 10.7 

32 01.03 02.06 05.09 04.12 05.14 06.18 07.22 08.24 09.24 10.3 

33 01.00 02.00 03.00 04.00 05.00 06.00 Q7 00 08.00 09.00 10.0 

34 00.97 01.94 02.88 03.88 04.84 05.76 06.76 07.76 08.72 09.7 

35 01.89 02.82 03.78 04.74 05.64 06.60 07.56 08.52 09.4 

36 01.84 02.78 03.68 04.62 05.56 06.46 07 36 08.26 09.2 

37 01.78 02.66 03.56 04.42 05.36 06.22 07!l2 08.00 08.9 

38 01.72 02.60 03.44 04.32 05.20 06.10 06.88 07.78 08.6 
5S 01.70 02.54 05.40 04.24 05.18 05.92 06.80 07.62 08.5 
40 01.64 02.46 05.28 04.12 04.92 05.76 06.56 07.58 08.2 



TABLE FOR COMPUTING GOLD CONTENT OP GRAVEL, 3-IN. DRILL. 



MgSO, and CaS0 4 still contains these salts after roasting, 
and an arsenical concentrate after roasting will possibly 
contain some ferric arsenate. 



Dividends 



The El Paso Con. M. Co. has declared a dividend of le. 
per share, payable June 29. 

The Hedley G. M. Co. has declared a regular quarterly 
dividend of 3% and an extra dividend of 2%, payable 
June 29. 

The Tonopah M. Co. has declared a regular quarterly 
dividend of 25c. per share and an extra dividend of 15c. 
per share, payable June 29. 

The Hudson Bay Mining Co., Ltd. (Temiskaming mine), 
has declared a quarterly dividend of 3%, payable July IS. 
This brings the total dividends to date to 47% of the capi- 
talization. 

The United States Smelting, Refining & Mining Co. has 
declared a dividend of 50e. per share on common stock 
and 87 1 /^c. per share on preferred, a total to date of 
$1(>,098,162. 



pump is very efficient in either clayey material or fine 
gravel, and in the Paracale district of the Philippine 
Islands, where this style of drill is used exclusively, I 
have seen five 30-ft. holes sunk in one day with only the 
pump employed within the tubes. 

In order to pull the tubes it merely becomes necessary 
to loosen and drop the platform clamps, allowing them 
to remain loose upon the tubes, and inserting a lever and 
fulcrum. In this manner a 50-ft. string of tubing can 
be removed in an hour under ordinary conditions. The 
weight of each tube is a trifle less than 20 lb., and the 
entire weight of a 50-ft. outfit is approximately 300 lb. ; 
easily transportable by the crew at one trip. I have at- 
tempted to use this drill in coarse gravel, but have found 
it unsatisfactory; principally because its lack of weight 
prevents it from being kept steady, and sunk vertically, 
any large stone deflects the tubing. But it has proved 
especially efficient in loam or clayey material and fine 
gravel or sand, also in deposits of fairly coarse and com- 
pact gravel covered with a thick subsoil or clay. 

One of these drills made of a /s-in. tubing and thoroughly 
equipped, costs $175 in Manila, $125 in Hongkong, and 
$150 in Japan, so that it would perhaps be fair to strike 



18 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



an average and place its price at $150, more especially 
as it is hardly likely that another place can be found 
upon the earth which is comparable to Manila for expen- 

siveness. 

The foregoing table has been calculated upon the basis 
of 3-in. diameter for the tubing, this diameter checking 
very closely with the measured volume and with the actual 
extraction, and upon a gold value of 0.06c. per milligram, 
fineness ST.") to 925. For greater depths than 30 ft. and 
weights over 10 milligrams, the necessary interpolation 
is simple and easily performed. Similar tables may be 
made for any other diameter of drill and fineness of gold. 
Where large numbers of holes are drilled such a tabic 
is a great convenience and saves much time. 



The Estimation of Ore in a Mine 



By H. S. Muxrok 

*In connection with the subject of mine valuation, some 
charts which I use in my lectures on the subject at the 
School of Mines of Colombia University may be of interest. 
The first of these charts is intended to emphasize the im- 
portance of taking into account the specific gravity of the 
ore in obtaining the average value from a series of samples. 
For the purpose of illustration I assume live samples taken 
at uniform distances in a galena vein, varying in thick- 
ness front 10 to 60 in., and the ore varying from 10 to 
80% of, lead. 



Thickness, 




Lead, 


Inch- 


Inches. 




%• 


Per cent. 


60 


X 


10 


- 600 


20 


X 


40 


= soo 


50 


X 


25 


= 1250 


10 


X 


80 


= 800 


10 


X 


60 


= 600 


5/150 




5/215 


150/4050 



Averages 30 in. 43.0% 27.0% 

(Arithmetric) (Volumetric) 

Calculating the average in the usual way by multiply- 
ing the thickness in inches by the percentage of lead 
and dividing by the total number of inches, an average 
value of 27% is found, which may be called t he volumetric 
average. This is less than the arithmetric average, which 
in this case is 43%. Neither of these results, however, is 
correct, as the result obtained by sampling must be given 
weight in proportion to the tons of ore which each sample 
represents. In the following table 1 have introduced spe- 
cific gravity as well as thickness. 













Inch- 


lickness, 


Specific 


Inch- 




Lead, 


Gravity 


Inches. 


Gravity. 


Gravity. 




%• 


%. 


60 X 


3.0 


— 180 


X 


10 


- 1800 


20 X 


5.0 


— 100 


X 


40 


= 4000 


50 X 


4.0 


= 200 


X 


25 


= 5000 


10 X 


7.5 


= 75 


X 


80 


= 6000 


10 X 


6.0 


= 60 


X 


60 


= 3600 


150 




150/615 






615/20400 



4.1 
Average 
Spec. Grav. 



33.17 
Average 
Per cent. 



If the thickness in inches is multiplied by the specific 
gravity of the sample, a product is obtained which may 
be called the inch-gravity value, which is a unit propor- 
tional to the tonnage represented by the sample. Multi- 
plying this by the percentage of lead found by assay 
gives an inch-gravity-per cent product. Dividing the sum 
of these last products by the total of the inch-gravity col- 
umn gives as the average 33.17%, which lies between the 
volumetric and t lie arithmetric average. This may be called 
the gravimetric average. The following example illustrates 
the necessity of pursuing the same plan when dealing with 
a gold or silver ore in which the gangue consists largely 
of heavy sulphides. 



*From Bulletin of Mining & Metallurgical Society of 
America. 



VOLUMETRIC (USUAL) METHOD. 



Thickness 




Value 


Inch- 


Inches. 




Per Ton. 


Dollar. 


1 c 

19 








10 


X 


1 (ij — 


10.00 


s 


X 


12.00 = 


60.00 


3 


X 


20.00 = 


60.00 


2 


X 


15.00 = 


30 00 


5/35 




5/50.00 


35/19000 


s 7 in. 




$1000 


$5.43 






(Arithmetric) 


(Volumet 



GRAVIMETRIC METHOD. 



Thickness, 
Inches. 
15 
10 

5 
3 

2. 

35 



Specific 
Gravity. 

2.6 

2.8 

3.8 

4.0 

3.5 



Inch- 
Gravity. 
39 
28 
19 
12 
7 



Value 
Per Ton. 

2.00 

1.00 
12.00 
20.00 
1500 



Inch- 
Gravity 
Value. 
78.00 
28.00 
228.00 
240.00 
105.00 



35/105 



105/679.00 



3.0 



$647 



The volumetric average obtained by the inch-dollar basis 
is •>"). 4.'!; the real average value based on tonnage will be 
$0.47. In both cases it will be seen that the errors that 
result from neglecting the specific gravity of the ore may 
be serious. The specific gravity of the different samples 
may he readily determined by the bottle method, using 
for this purpose material from the portions of each sam- 
ple which are rejected when crushing and working down 
the mine sample to the usual bottle sample for assaying. 

I shall also call the attention of the members to the use 
of the well known formula for determining the probable 
error of the arithmetric mean of a number of observations. 
The use of this formula for the study of sampling data 
will give valuable information as to the accuracy of the 
final result and enable one to deal intelligently with high 
assays. If v = number of observations, and d = differ- 
ence of each from the arithmetical mean, then the 



Probable Error ^0.0 



74.'. + <P 8 + 



n (« — 1) 



In the Transactions of the Institution of Mining and Met- 
allurgy for January 1007, E. H. Garthwaite has given 
some interesting results from the sampling of a gold mine 
in Rhodesia. In one case, the second example cited. 71 
samples were taken at 2-ft. intervals. A summary of 
these results, as worked out by Mr. Garthwaite, is given 
below. It will be noticed that there are a number of high 
assays and, apart from this, that the range is great. 

SUMMARY OF ASSAY RESULTS. 





No. of 




No. of 


ssav Value. 


Samples. 


Assay Value. 


Samples 


0-5 dwt. 


13 


50-75 dwt. 


6 


5-10 " 


17 


75-100 " 


S 


10-20 


17 


100-200 " 


3 


20-30 " 


3 


200-300 " 


1 


30-40 " 


5 


300-700 " 


none 


40-50 " 


none 


700-800' " 


1 








71 



Including all assays, the average value is 43.35 dwt. 
Applying the formula, a probable error of zt s -' : > is ob- 
tained, that is, the value lies somewhere between 35.20 
dwt. and 51.50 dwt. If the one high assay, which lies 
between 700 and S00 dwt.. is omitted, the average of the 
remaining 70 samples lies between 31.08 and .33.49 dwt., 
or, say. 32.2!) dwt.; or somewhat less than the lowest prob- 
able value. Even omitting this high assay, the probable 
error is ± 4.10 dwt., which still leaves much uncertainty 
as to the real value of the ore. It is evident, in this par- 
ticular ease, that the ore is unusually variable, and that 
a safe average value can be obtained only by increasing 
the size of each sample or the number of samples taken. 
If large samples had been taken, it is possible that the 
variation in value would have been less and the probable 
error much smaller. 

Mr. Garthwaite made some interesting comparisons of 
results that would have been obtained with other sampling 
distances. For example, taking every alternate sample in 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



19 



the mine, he obtained two sets of results for a 4-ft. sam- 
pling interval. By taking every third sample he obtained 
three results, which would have been obtained by sampling' 
at 6-ft. intervals. By taking every fourth sample, he 
obtained four sets for an 8-ft. sampling interval, and in 
a like manner, by taking every fifth sample, he obtained 
five different values for the mine with a sampling dis- 
tance of 10 ft. These results were as follows: 



Sampling 


Average 


Average 


Sampling 


Average 


Average 


Distance. 


Value. 


Width. 


Distance. 


Value. 


Width. 


Ft. 


Dwt. 


In. 


Ft. 


Dwt. 


Tn. 


2 


43.35 


32.0 


8 


22.74 


32.0 


A 


35.16 


32.0 


10 


20.26 


32.5 


A 


50.84 


32.5 


10 


90.37 


30.0 


6 


28.17 


32.0 


10 


44.85 


30.0 


6 


66.57 


29.5 


10 


29.97 


34.0 


6 


33.52 


33.0 


10 


29.87 


32.0 


8 


35.13 


31.0 


Inde 


pendent Sa 


mpling. 


8 


79.34 


32.0 


10 


14.60 


35.3 


& 


33.18 


33.0 


10 


16.00 


32.0 


Making 


the proper substitutions in 


the formula, we 



find the probable error in each case is shown in the table. 



the furnaces have been made more efficient. Cyanamide, 
another nitrogenous fertilizer of growing importance, is 
being manufactured in America, and the industry should 
prove successful, as the production in this country of the 
calcium carbide required by the process is second only to 
that of Norway. 

Goldfield Consolidated Report 

During May the total production of the Goldfield Con- 
solidated Mines Co. was 30,215 tons, containing $550,656.69, 
or an average of .$18.22 per ton ; of which 29,029 tons was 
milled with an average extraction of 91.44%, and 1186 
tons of an average value of $28.25 per ton was shipped, 
the net recovery from all ore being $16.69 per ton. The 
total net realization was $309,622, or $10.17 per ton. Of 
development work, 2911 ft. was performed during May. 
The total cost of mining, development, transportation, mill- 
ing, office, and general expense was $6.72 per ton, dis- 
tributed as follows : 



Sampling 
Distance. 
Ft. 


Samples 
Taken. 


Average 
Value. 
Dwt. 


Probable 
Eiror 


Ejlreme Values. 
(Theoretical) 


RESULTS OBTAINED. 


10 


15 


43.35 


± 17.74 


25.51 - 61.09 


14.60 - 20.26 - 29.87 - 29.97 - 44.85 - 90.37 


S 


18 




± 16.42 


26.93 - 59.77 


22.74 - 33.18 - 35.13 - 79.34 


6 


24 




± 14.12 


29.23 - 57.47 


28.17 - 33.52 - 66.57 


A 


36 




± 11.45 


31.90 - 54.80 


35.16 - 50.84 


2 


71 




±8 15 


35.20 - 51.50 


43.35 Sampling distance actually used. 


1 


141 


?' 


± 6.12 


37.23 - 49.47 


28.6% Probable variation. 


0.5 


281 


? 


± 4.10 


39.25 - 47.45 


18.7X 


0.25 


561 


? 


± 3.10 


40.25 - 46.45 


14.3X 



Mining: 

Development 
Stoping 



Comparing the theoretical range, it will be seen that 
with the 10-ft. sampling interval the results actually ob- 
tained in the mine ranged from 14.60 to 90.37 dwt. The 
error of the mean is only a probable error; therefore, 
the actual error is certain to be more than this probable 
error in some cases. The same will be observed in the 
ease of the probable and actual errors in the 8-ft. sampling 
interval, although the number of results being small, the 
variation is not so great. The 6-ft. sampling interval with 
only three results shows a close correspondence with the 
theoretical value. The 4-ft. sampling interval with only 
two results does not reach the theoretical extreme value. 
The application of the formula may be extended by com- 
puting the probable results for 1-ft., 6-in., and 3-in. sam- 
pling intervals. Under the last supposition, 561 samples 
would have been taken, forming a sample practically con- 
tinuous, but even in this case the values would range from 
40.25 to 46.45 dwt., or a range of 14.3% if referred to 
the 43. 35 dwt. average. 



The Utilization of Atmospheric Nitrogen 

The importance of nitrogenous compounds to the agri- 
cultural and industrial interests of Europe and America 
has prompted the Bureau of Manufactures to issue a 
monograph on the subject of utilizing atmospheric nitrogen 
in the production of such compounds. The nitrogen prob- 
lem, one of the most pressing of the twentieth century; 
is unique from the fact that the material is unlimited. 
The atmospheric nitrogen above one square mile of land, 
amounting to about 22,000,000 tons, is equivalent to what 
the world would require in the next fifty years at the pres- 
ent rate of consumption. The problem is to utilize this 
nitrogen economically, and thus free the world from its 
dependence on the nitrate deposits of Chile, which are 
not particularly extensive and are likely to be exhausted 
at a comparatively early date. 

Remarkable results have been obtained in Norway by 
means of electric furnaces in which atmospheric nitrogen 
is oxidized in the form of nitric oxide, which is used 
in making calcium nitrate, or Norway saltpetre. This 
Norwegan product is already an important rival of Chile 
saltpetre, but as the success of the process depends upon 
a very cheap supply of electricity, it will probably not 
be used to anv great extent in the United States until 



$3.27 

Transportation $0.08 

Milling 2.20 

Marketing 0.07 

General expenses 0.67 

Bullion tax 0.11 

Marketing ore shipped 0.25 

Construction 0.07 



Total cost of operation $6.72 

Miscellaneous earnings 0.12 

Net cost per ton $6.60 

The new stope in the Reilly vein, southeast of the Com- 
bination shaft produced 1100 tons of ore that averaged 
$56 pei- ton. The 328 sill produced 50 tons of ore, averag- 
ing .$30 per ton. The downward extension of the 402-C 
slope, about 300 ft. north of the shaft between the fifth and 
sixth levels, produced 260 tons of ore which averaged $28 
pei- ton. This is the greatest depth at which ore has been 
found in this mine. The sill floor of the 3-D stope in the 
Sheets-Ish workings on the 150-ft. level of the Mohawk 
produced 200 tons of $39 ore. The 215-X intermediate drift 
under the 111 stope, about 200 ft. south of the shaft, has 
been extended about 80 ft. through ore that has averaged 
$12 per ton. This orebody is the downward extension of 
the big 111 stope and will produce a large tonnage of good 
ore. The 307- V raise, 150 ft. southeast of the shaft on the 
third level, passed through 10 ft. of ore that averaged $80 
per ton. This ore is the upward extension of the 307 stope 
that was cut off by the Mohawk fault. The 354-Q, at the 
south end of the 354 stope on the 450-ft. level, produced 
260 tons of $45 ore: A new section of the 407 stope on the 
600-ft. level produced 648 tons which averaged $52 per ton. 

The greater part of the development in the Clermont is 
being done on the lower levels, where good results are being- 
obtained, especially on the 1300-ft. level of the Grizzly 
Bear. From this' level the third compartment of the shaft 
is being raised to the 1000-ft. level, and is progressing at 
the rate of 20 ft. per day. A drift being driven on the new 
orebody has been advanced about 80 ft. through ore that 
has averaged $20 per ton. An average sample from the 
face on June 27 assayed $76 per ton. The cross-cut has 
been stopped until the shaft has been enlarged and a double- 
drum hoist installed. After this work is completed, develop- 
ment on this level, as well as sinking the shaft to the 1450- 
ft. level, will be carried on more rapidly. In the Laguna 
the sump below the 720-ft. level pump station and main 
station have been completed, and a pump installed to raise 
the water in one lift to the surface. The work of pros- 
pecting the large quartz mass on this level is now in pro- 
gress. The Jumbo has been connected on the 250-ft. level 
with the workings on the south end of the properly. 



20 



MINING AND SCIENTIFIC PRESS 



July G. 1012 



Discussion 

Readers of the Mining and Scientific Press are invited to 
use this department for the discussion of technical and other 
matters pertaining to mining and metallurgy. The Editor 
welcomes the expression of views contrary to his own, be- 
lieving that careful criticism is more valuable than casual 
compliment. Insertion of any contribution is determined by 
Its probable interest to the readers of this journal. 



The Calumet & Hecla Mill 

The Editor: 

Sir — In the issue of the Mining and Scientific Press 
of June 8, a note appeared on page 809, under 'Michigan', 
to the effect that the Calumet & Hecla was installing 
Huntington mills in its new re-grinding plant. This is 
an error, for the machinery which has been ordered is 
sixty-four 8-ft. diameter Hardinge pebble-mills. 

Subscriber. 

Lake Linden, Michigan, June 20. 



Mutual Liability Insurance for Mine-Owners 

The Editor: 

Sir — A. J. Pillsbnry's article in the Mining and Scien- 
tific Press of May 11 interests me, and I would be glad 
to have his opinion of a plan for mutual liability insur- 
ance conlined to mine-owners of California, exclusive of 
coal properties. Unless the laws of this state preclude 
it. I would suggest that a mutual company be formed 
to issue policies, limiting liability to $1000 for a single 
accident, or the face of policy if for less. Premiums would 
be such as the directors determine; perhaps the first year 
n or 10o; ; thereafter as statistics of losses would make 
necessary. A yearly dividend or return premium might 
accrue after the amount for a reserve or guaranty fund 
was set aside. This fund should be invested only in state, 
municipal, railroad, or other so-called 'gilt-edged' bonds. 
Each policyholder to be entitled to one vote, and direc- 
tors and other oilieers to be elected by policyholders each 
year. 

The fixed expenses need not he large; only the pres- 
ident, vice-president, engineers, and secretary-treasurer 
should he paid a salary. A small corps of inspector^ 
would be necessary in the engineering department. The 
vice-president and secretary-treasurer need be the only 
active officers. Risks should be assumed only on proper- 
ties conforming to the company's by-laws and laws of 
the slate as to safety appliances. Of course, policies would 
have to be assessable, but only a pro rata fixed amount. 
T should be glad to have criticism of this plan, and also 
information as to whether any state laws would interfere 
with it. 

Charles E. Parsons, 2nd. 
Washington, California, June 18. 
The Editor: 

Sir — I am not enough versed in mining to know whether 
there i« sufficient similarity in risk and mechanism to 
warrant the organization of mining for the precious metals 
into a mutual insurance association for carrying each 
others' risks. I am not certain that there is a sufficient 
similarity between the hazards of deep quartz mining 
and drift mining or mining with dredges or hydraulic 
power to afford a sufficient community of interest to en- 
able such miners to work together in harmony. 

Again. T do not know if there is enough mining in 
any one of the classes of mining enterprise in the slate 
to afford such an experience with industrial accidents as 
would amount to a general average risk, upon which 
alone a satisfactory basis of rate-making can be had. 
These are questions for mining engineers and mining men 
to determine, and not for me. They are only unanswered 
questions in my mind. The Legislature of California, at 
its recent extra session, so modified the laws relating to 
inter-insurance (Chapter 22) as to permit certain occu- 
pations having a similarity of risk to unite in insuring 
each other, but I think little use has been made of the 



law so far and for the reason that employers, even those 
who are inter-insured as to fire risks, feel that the next 
Legislature will so deal with the insurance problem as 
probably to undo whatever might be done under this law 
as it now stands. 

The laws of California do not now permit the forma- 
tion of mutual insurance companies for covering liability 
or compensation risks because of industrial accident. The 
Industrial Accident Board is at work on the formulation 
of bills to submit to the next Legislature for covering 
the whole insurance problem, but I do not know what 
direction such legislation will take. There is a consider- 
able feeling that the state should undertake insurance 
against industrial accident, but I am inclined to favor 
a rigid state control, coupled with the authorization of 
properly regulated mutual associations and supplemented 
by such a nucleus of state insurance as will make provi- 
sion for the compulsory insurance of the industrial hinder- 
most, which otherwise, through its carelessness and neglect, 
would be most likely to result in throwing the injured 
upon public or private charity. This is a rough outline 
of a policy that is taking shape in my own mind, but I 
cannot speak for others in that regard. However, I feel 
very certain that something definite will be done at the 
next session of the Legislature, and I regard it as ex- 
tremely important that the mining interest, as well as 
others, prepare themselves for taking an intelligent and 
broad-minded interest in what the Legislature shall under- 
take to do. Meantime this Board will be very glad of 
suggestions from all persons who have ideas or informa- 
tion that will be of value to us in doing the preparatory 
work for legislative action. 

A. J. PlLLSBURY. 

San Francisco, June 21. 



Mining Reports 

The Editor: 

Sir — In the United States it is comparatively easy for 
a mining manager to report to his headquarters by tele- 
graph, and the expense of the operation is never a seri- 
ous item, because the mines and company's main office 
are so situated that the telegraph rate, especially with the 
night lettergram, is reduced to a minimum. However, for 
those mining companies whose headquarters are in London 
and whose mines are situated at various points of the 
globe, it is necessary to condense in a telegram the maxi- 
mum of information in order to save the expense of 
cabling at 75c. or a dollar per word. Most of the mining 
companies have arranged private codes, so that the de- 
velopment work can be reported in a way to save as 
many code words as possible: and as a usual thing, the 
telegraphic reports, which, according to a very good cus- 
tom, are here published in the financial daily papers, are 
remarkable for their conciseness and the amount of in- 
formation they contain. They not only keep the share- 
holder fully advised of the progress of the development 
work, but being published immediately on their arrival, 
take considerable responsibility from the shoulders of the 
directors. As a brilliant example of what not to do. and 
showing to what extremes a mine manager may be driven 
when he has nothing to report, the following report from 
the Brazilian Golden Hill mine which was published in 
the Financial News (London) is a good illustration: 

"The General Manager on January 13th reports as fol- 
lows: — Second level west drive shaft Xo. 1 driven 30 feet, 
total 50 feet. Stope driven west Xo. 1 shaft at 08 metres, 
driven 11 feet, total 26 feet. Xo. 2 adit driven 20 feet, 
total 31o feet. At .312 feet quartz leader was met; it is 
barely one inch in width and carries no value. There is 
now ci'rr?/ indication that tee are close upon the first reef." 
'(The italics are mine.) 

With such brilliant development and under such able 
management, there is no doubt that this company's opera- 
tions should be highly successful. 

C. S. Herzio. 

London, June 11. 



July 6. 1912 



MINING AND SCIENTIFIC PRr_5S 



Special Correspondence 

SALT LAKE CITY. UTAH 

Reorganization Puss of Ohio Copper. — Patents of 
Mixing Claims. — Report of Silver King Coalition 
Company. 

Stockholders of the Ohio Copper Co.. after a long wait, 
are beginning to get some direct information about the 
property. Unfortunately, the information is not of a 
reassuring trend. Back of the announcement of a plan 
to reorganize on a basis which will amount to an assess- 
ment of £1 per share, it is said on authority worthy or 
credence, is the recent report of Henry Krumb. who was 
employed by bondholders and other creditors to make ar. 
examination of the Ohio. According to his report, the 
developed tonnage in the Ohio was sufficient only to pay 
the interest on the outstanding bonds for about ten years. 
In its anxiety to make a showing on low cost of mining, 
apparently the management has been cutting down the 
prospecting expense below the proper limit. The annual 
report gives the cost of mining at 26.73c. per dry ton of 
ore. The same report declares there are 3.200.000 tons 
of developed and between 9.000.000 and 10.000.000 tons 
of •probable" ore in the mine. The mill has been treating 
about 50.000 tons per month, and the plans, if properly 
financed, call for a 50°^ increase in that capacity. During 
the six months from October to March, inclusive, the mill 
treated 311 .06S tons of ore having an average copper 
content of 1.176°^. with a total production of 3y754yB6G 
lb. While the Ohio Copper, controlled by F. A. Heinze. 
is in difficulties, it is noteworthy that the Mascotte tun- 
nel, owned entirely by Mr. Heinze. is proving a highly 
profitable venture through its contract with the Ohio for 
transportation of ores. The revenue for the six months 
mentioned was close to £50.000. and it will increase in 
proportion with any enlargement of tonnage. The roy- 
alty is 15c. per ton. The plan of reorganization on which 
the stockholders will rote provides for a reduction of the 
par vahie of the stock from $10 to $5. The number of 
shares will be 1.600.000. One share of old stock plus $1 
will call for one share of the new. which has been under- 
written at $1.25 per share. This disposes of 1.260.S79 
shares of the new company: 250.000 will be set aside for 
the conversion at par of the $1,250,000 of bonds outstand- 
ing: leaving S9.130 shares, out of which not to exceed 
39.000 shares may be used as underwriters" commission. 
The directors state that this plan, if carried through, will 
pay off the floating debt, complete the mill at a cost of 
n»t over -550.000. and leave the company approximately 
$350,000 working capital. 

Utah mining men are again stirred up over the atti- 
tude of the Interior Department of Washington over ap- 
plication for patent of mineral claims. The Department 
has taken the position in several cases, notably in the East 
Tintic case, that ore in paying quantities in place must 
b« developed before application for patent will he granted. 
Geological conditions, the development of ore in adjoining 
properties at depth trending into the claim, neither of 
these may count if ore of commercial grade is not actually 
developed. The Commercial Club of Salt Lake City, the 
Salt Lake Mining Exchange, and other organizations ap- 
pealed to the Utah delegation in Washington to take the 
matter np with a view to influencing the attitude of the 
Interior Department to one more encouraging to the de- 
velopment of mining. Assurances were received that the 
Department would be more liberal in the future. Now 
comes, however, a formal letter in defense of the Interior 
Department, from Samuel C. Adams. First Assistant Sec- 
retary, reiterating the former position, and giving the 
poor prospector little encouragement unless he has the 
money to open a paying mine before he applies for pat- 
ent. This gives rise to the belief that only a change of 
administration in the Department or a change in the laws 
will offer hope for an altered position of the authorities. 



The management of the Silver King Coalition Mines Co. 
has not been in the habit of giving complete, detailed 
information about the property, but the annual report 
recently issued is an exception. It shows a profit for the 
year ended April 30. 1912. of $583,017.25. despite extraor- 
dinary expenditures for new equipment and purchases. An 
interesting feature is shown in the accumulation of a fund 
io pay the judgment of the Silver King Consolidated Co_ 
in case the higher court affirms the immense verdict, and 
still resume the payment of dividends. The Silver King 
Coalition and its predecessor, the Silver King, has paid 
a total of $12.334.SS5 in dividends. The average assay 
of 21-506 tons of shipping ore marketed during the year 
was : lead. 28.35^ ; silver. 50.06 oz. : gold. 0.0S33 ounce. 

JOHANNESBURG. TRANSVAAL 

Results of Consolidation of Rand Properties. — Report 
of Director of Crown Mines. Ltd. 

A feeling has been growing on the Rand that the prac- 
tice of merging the different mines into one concern has 
not been to the advantage of shareholders. Where large 
areas of worthless or lower-grade properties have been 
absorbed, the merger can scarcely be expected to help the 
shareholders when the nominal capital of the concern and 
costs of management have both been enormously increased 
at the same time. Several instances of this kind on the 




SOUTH RAND SHAFT. CROWN MINES. 



Rand might be mentioned, and stockholders have had to 
suffer, rather than those who control the management. 
The way out of the difficulty has not yet been discovered. 
Such mergers have tended to bring well meant combina- 
tions into contempt, although when consolidations are well 
planned and carried out. they must act to the benefit of all 
concerned. At the last meeting of the Crown Mines. S. 
Evans, the managing director, set himself the task of show- 
ing that the consolidation of the Crown. Crown Deep. Rob- 
inson Central Deep, and Langlaagte Deep had really been 
to the advantage of all the shareholders concerned, and 
in the long run the shareholders would realize that fact. 
He was able to point to better results in the shape of 
higher working profits and to some of the promises made 
at the time of incorporation being more than fulfilled, 
but he failed to convince shareholders in his explanations; 
of why working costs had increased from 15s. lid. in 

1909 to 19s. 3d. in 1911. or that dividends of 120<^ in 

1910 and 110^ in 1911 were satisfactory when L. Reyers- 
baeb in 1909 had forecasted 130<~ f dividends for the 
stockholders as a result of the merger. The managing 
director, however, explained that since the merger the 
profitable ore reserves had been increased from 3.916.593 
tons with gold content valued at over £6.000.000. to 10.124.- 
072 tons with a total value of nearly £15.000.000 of re- 
coverable gold content, which meant, in other words, that 
the profits in sight, to be realized later, had been nearly 
doubled since consolidation, and were estimated at over 
£6.000.000. When, however, the managing director came 



22 



MINING AND SCIENTIFIC PRESS 



July 8, 191-2 



to deal with the actual results of the combination, there 
were many explanations to make, more particularly with 
regard to the fact that at the time of consolidation the 
cash capital available, amounting to £721.000. had not 
only been spent, but another £900.000 in addition, not to 
mention the £300,000 spent in development, which would 
have to be deducted from future profits. The principal 
reasons for this heavy outlay were, the increasing of 
the capacity of the ore-reduction plant by no less than 
half a million tons per year more than arranged for 
at the time of consolidation, unforeseen expenditure in 
other directions, and the work having turned out to be 
very much more costly than was set forth in the engineers' 
estimates. The following striking figures were quoted as 
showing the results before and after consolidation : 

5 Years Before Since Consolidation : 
Consolidation. 1910. 1911. 

Yield per ton 38b. 7d. 33s. 5d. 35s. Id. 

Costs per ton 19s. 8d. 18s. Id. 19s. 3d. 

Profits per ton. . . 18s. lid. 15s. 4d. 15s. lOd. 

The better grade obtained in 1911 is due to closer sorting, 
the percentage sorted out being increased from 8.3 to 11.7%. 
It was calculated that at the time of consolidation Kifi.OOO 
tons per month would be milled, but up to the end of 
1911 this had not been attained, for in 1910 only an 
average of 120,000 tons per month was milled, and in 1911 
134,875 tons. These disappointing results are claimed to 
be due to scarcity and inefficiency of labor and to troubles 
with the shafts at the Crown Dee]) and Robinson Central 
Dee]) mines. Despite all these drawbacks, the managing 
director claimed it only needed patience and the completion 
of the enlarged program to make the merger a success. The 
capacity of the ore-reduction plants had been increased to 
212.000 tons per month, the work of seven shafts was being 
concentrated at two shafts whose combined output was 
estimated at 11,000 tons per day of ten hours, and a drift 
15 ft. wide was being driven for a distance of over three 
miles throughout the whole length of the property, of which 
two-thirds had been already driven. This was to be worked 
by electrical haulage. Large crusher stations have been 
( reded at the two main shafts, and it might require two 
or three months to get the whole of the new equipment 
working on a smooth-running basis. When that was 
achieved he felt certain that all the benefits of combination 
such as lower working costs, higher profits, more uniform 
and stable results would be achieved. 



BOSTON 



Activity in Buttk & Svpkrior. — United States S. R. 
A M. Co. Acquires Coal Pbopertt. — Speculation 
DJ London CoppeE. 

The wide swath which Butte & Superior is cutting in 
the market here has had the effect of broadening Boston 
into a general mining share market. On Wednesday, June 
12, Butte & Superior reached its high mark of 51% in the 
market here and represented a larger volume of trading 
than any other railway, industrial, or mining enterprise on 
either Wall or State streets, with the single exception of 
Reading on the New York Stock Exchange. The following- 
day the News Bureau, the official organ of State street, 
made this most important statement as a combination of fact 
and comment: "On Wednesday the Boston market became 
the zinc market of the country, and during the past week 
Boston has probably dealt in more copper stocks, zinc stocks, 
and coal stocks than any other exchange in the world. Bos- 
ton is fast becoming the most important mining market in 
this country.'* Butte & Superior has, indeed, created a pro- 
found sensation in both Boston and Butte. People, who 
were hitherto entirely ignorant of zinc conditions, now 
take the liveliest interest in everything concerning them. 
American zinc has enjoyed an active market contempor- 
aneously with Butte & Superior, and inquiry extends to vari- 
ous zinc situations throughout the country. New capital is 
going into Joplin. New mining deals of considerable mag- 



nitude have been made there lately and big syndicates are 
securing options on additional tracts of territory. The 
New Jersey Zinc Co. is one of the closest corporations in 
the country and is reported to have paid out over 100% 
in dividends in a single year. Its New Jersey mine con- 
tains a remarkable body of ore running more than 20%, and 
a large profit is made from sulphuric acid in Wisconsin. 
Butte & Superior ore runs from 20 to 40%. Butte & 
Superior is claimed by many to be the biggest and 
richest zinc mine in the world, though it has not more than 
3.000,000 tons of ore blocked. The breast of every drift 
is in ore and the bottom of the mine, at the 1000-ft. level, 
shows a continuation of the orebody. Engineers who have 
seen Butte & Superior recently, are of the opinion that it 
will yet turn into a copper mine at depth. The stock was 
first put out at Dnluth. and sold as low as $5 per share. It 
was reluctantly considered by Hayden, Stone & Co., bankers 
of Boston, until D. C. Jackling examined the property, 
and he recommended that $1, 000.000 of the company's 
Convertible bonds, convertible at $10 per share, be under- 
written. Last January the stock was listed on the Ex- 
change here and trading began around $20 per share. It has 
since sold up to + , and predictions are made that $75 per 
share will yet be reached. W. A. Clark is largely interested 
in Butte zinc mining and believes that there are other com- 
ing producers of zinc in Butte, namely the Elm Orlu. which 
ne controls; the Alice mine, belonging to Amalgamated; 
and the Moulton. He is rebuilding a mill for the purpose of 
concentrating the local zinc ores. At present he is ship- 
ping to the Washoe smelter. The treatment of Butte zinc 
ores is still in an experimental stage, but the Butte & 
Superior mill and that of Mr. Clark's will undoubtedly work 
out the problem. During the activity of Butte & Superior 
the coal issue of Hayden. Stone & Co.. Island creek and 
Pon creek, have also been at times active. These coal and 
zinc movements have contributed signally to the broadening 
of the Boston market, suggesting that in the future it will 
be a general mining share market, no longer confined to 
copper. This is easily the most important phase of mining 
and market developments in Boston for the past year. 

The recent activity in the shares of the United States 
Smelting. Refining & Mining Co. has attracted no little 
attention. Recently the company, which is a securities- 
holding corporation, issued $10,000,000 in five-year 6% 
notes in order to acquire the Castle Valley Coal Co.. the 
Black Hawk company, and the Consolidated Utah Fuel 
Co., in central Utah. The company has ownership anil 
control covering approximately 100 mines in the United 
States. .Mexico, and Alaska. It is believed that, notwith- 
standing the new financing necessary to acquire the coal 
properties in Utah, which are already self-sustaining, th* 
company will soon increase its dividend rate of $2 per 
year on the common stock. After having written off a 
million dollars for plant depreciation each year since or- 
ganization in January 190(1, the company is now earning 
annually about $10 per share on the common stock. With 
silver at (ilc. and copper at 17 1 2<'.. the company's 
affairs are in excellent shape. Over 40<~; of the revenue 
comes from silver. The acquisition of the Utah coal prop- 
erties places United Slates Smelting in a favorable strategic 
position, as it controls the bulk of the large coal de- 
posits of Utah. The coal produced there is of excellent 
quality and makes good coke. With Utah coal and Cali- 
fornia oil, Boston interests figure that the Far West will 
get all the fuel it needs, this being in great contrast to 
conditions there a generation ago. The United States is 
hugely a Boston company, though its American offices 
are in Salt Lake and its Mexican offices in Mexico City. 
James J. Storrow, formerly candidate for mayor of Bos- 
ton, and a member of the banking house of Lee, Higgin- 
son & Co., is a member of the board of directors. Lee, 
Higginson ft Co., act as the company's bankers. The 
Common stock sold up to $70 per share in the first year 
of its history and prospects are excellent for it to reach 
that figure again. It is now selling around 45, having 
advanced ten or eleven point! above the low price of the 
vear. 



July 6, 1912 



MINING AND SCIEN TIFIC PRESS 



23 



A few clays ago a break in G. M. B. was reported 
from London, and the cabled advices were that the un- 
expected drop in price was due to the rumor of large 
hidden stocks of copper in the United States. This rumor 
was cabled to the London Times from New York, and it 
is now believed that Thomas W. Lawson, who is reported 
to be conducting a market manipulation in the metal on 
the bear side, had something to do with furnishing the 
information. While it is admitted that there are some 
speculative lines on the long account in both Europe 
and America, it is held here that there is no warrant 
for the belief that there are large invisible supplies of 
copper anywhere, or that there is any break coming in 
the demand for consumption. The loss thus sustained 
in London, due to the bearish rumor cabled to the Times, 
was quickly regained in the subsequent market quotations. 
In fact, it is reported that the leading copper interests 
in London took advantage of the break to buy copper 
at reduced figures. It is believed here that copper will 
be 20c. per pound before the end of the year, but the 
public is still slow to credit as substantial the progress 
being reported in the market. 

TORONTO, CANADA 

Porcupine Mills in Operation. — Meeting of the Dome 
S'peel Corporation. 

Both the Hollinger and the Vipond mills are in oper- 
ation. High-grade ore will lie treated at the Hollinger, 
(he mill being constructed strictly for rich ore. The dump 
at No. 1 shaft contains thousands of tons of $20 ore ex- 
tracted when the property was being proved in 1910. At 
the Vipond the ore in the 100-ft. level in the Godfrey vein 
lias been broken down anil will be milled first, and the 
dump ore. averaging .+10 to $14 per ton. will also be 
worked. At the Dome, all the stamps and three of the 
tube-mills are working steadily. Twelve raises have been 
1 > lit through to the surface, and drills are breaking down 
the ore from above. The mine will be quarried to the 
100-ft. level, there being sufficient ore in sight above this 
level to Supply the mill for some years. No development 
is being done at lower levels ;il present. Diamond-drill 
operations have demonstrated the continuity of the ore- 
body toward the Dome Extension line. It is understood 
that the Dome has taken an option on the La Pahue prop- 
erty in (he Three Nations district, on which considerable 
work has been done with encouraging results. F. P. Schwin- 
dler has resigned his position as manager of the Mclntyre, 
and the mine will be under the direct management of C. B. 
Flynn. A heavier hoist is being installed at No. 4 shaft 
for working the deeper levels. The Hughes is installing 
a compressor plant, and a large portion of the working 
force has been laid olf until the power is available. The 
Dome Lake, which is installing a compressor plant, has 
found a wide vein in the shaft at a depth of 48 ft. The 
Crown Chartered has cut the fissure zone at the 200-ft. 
level at a distance of over 100 ft. from the shaft. On 
the first level over SOO ft. of underground work has been 
done, which revealed a number of quartz veins. Active 
operations have been resumed at the Pearl Lake. A sta- 
tion had been partly cut in No. 1 main shaft at the 300- 
ft. level when work closed down. This will be completed 
and sinking continued to the 800-ft. level. A carload of 
30 tons of ore, sent by the McEneany to McGill University 
at Montreal for testing, is stated to average $18 per ton. 
As a further test, to decide on the character of the process 
to be adopted, 100 Ions more will be put through the Mc- 
lntyre mill. D. F. King, formerly manager of the Vane 
syndicate, has been appointed manager of (he Achilles. The 
-tock market continues inactive and declining, speculative 
buying has practically ceased. The public has completely 
lost faith in prospective and rose-colored anticipations of 
future profits, and no return of activity need be expected 
until practical results from the operations of the big mills 
are forthcoming. Hollinger. however, has shown marked 
si l ength, the stock for the last few days selling above $13, 
on favorable reports sent from the mine. The Standard 



mine has been closed down, as the ore-shoots, though wide, 
proved to be very short. 

The annual meeting of the Dominion Steel Corporation 
was held at Montreal on June 12. The reports presented 
showed net earnings for the 21 months from July 1, 1010, 
to March 31, 1912, after payment of dividends, amounting 
to $1,484,945. Of this sum $700,000, written off as a spe- 
cial appropriation for depreciation and renewals, was de- 
duceted, leaving a surplus of $7<S4,045. A dividend of 4% 
was declared. The increase in output came up to expec- 
tations, but the Steel company's earnings reflected the un- 
satisfactory conditions of the trade in the United States as 
regards prices, and conditions as to counties and duties 
also affected this department adversely, as part of the 
product had to be sold in competition with duty-free im- 
ports from the American side. The coal business was satis- 
factory, the output for the year ended March 31 having in- 
creased from 3,862,161 ton's in 1911 to 4,406,263 tons in 
1912. During the year, $1 ,.176,931 had been expended on 
new collieries in Cape Breton, and $23,3.53 on the Cumber- 
land property. The new mines in the Lingan district made 
an excellent showing, both in the tonnage and quality of 
the coal, and there continues to be a good market for all 
coal produced. Expenditures on capital account for the 
Steel company amounted to $2,714,539. The nail mill will 
shortly be in operation and the company will then turn its 
wiic bars into nails, which are protected by the tariff, in- 
stead of having to sell them in competition with rods im- 
ported duty free. 

REPUBLIC, WASHINGTON 

Power Development for Chewelah District. — New Con- 
centrator for the Tungsten Consolidated Mines 
Company. 

It is anticipated that the Washington Power Co. will con- 
struct a high-potential line from its plant at Long Lake 
the coming summer to supply for Chewelah district a 
long-felt need of motive power. A large sum has been 
spent in remodeling the mill at the Napoleon mine, near 
Bossberg, and placing new machinery to handle the oxi- 
dized ore. The sulphide material will be shipped to the 
(liven wood, British Columbia, smelter, in which the lead- 
ing stockholders of the Napoleon company are interested. 
At the Clugston mine, east of Bossberg, an adit is being 
driven on a silver-lead vein, on a good grade of ore, and 
a considerable quantity of high-grade ore has accumulated 
ready for shipment. During the summer J. R. Brown, 
the manager, expects to push development work and make 
regular shipments. The lessees of the Gold Hill mine, 
near Myers Falls, shipped a carload of ore recently to 
the Tacoma smelter, which brought returns of $48 per 
ton. The Granby Mining, Smelting & Power Co. of 
Grand Forks, British Columbia, has purchased from Jay 
R. Graves a 60-acre tract, bordering the Columbia river, 
and the island at the cataract, at the Kettle falls, and 
an improvement is anticipated to entail an expenditure of 
$2.(100.000. The deal leads people familiar with the situa- 
tion to believe that the Granby company will go to Kettle 
falls for its power. In the Orient district a night shift 
has been put on at the First Thought Extension mine, to 
push development and work on a larger scale. A new 
road to the mines will be completed with the view of ship- 
ping ore to the smelter. At Loon Lake the Tungsten Con- 
solidated Mines Co. is installing a new concentrator at the 
mine and expects to begin shipping concentrate in thirty 
days. 

Chewelah district is more active than ever before in 
its history, and is regarded as a future producer. The 
United Copper Co. is now shipping a carload of high- 
grade ore daily and is driving a new adit with 8-hour 
shifts, to intersect the main vein at a depth of 1200 ft., 
about 3000 ft. from the portal. On the Copper Queen, 
owned by the same company, an adit is being driven to 
cut the southwest extension of the United Copper vein 
at a distance of about 400 ft. The company is employing 
70 men. In the opposite direction, on the same vein, at 



24 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



a depth of about 100 ft., Oppenheimer brothers are run- 
ning on a large body of high-grade ore in the Amazon 
claim. EL J. Davis, who has bonded the Blue Star mine 
from the owners, is sinking a shaft on the vein and ship- 
ping a carload of high-grade ore monthly. 

The King Solomon mine in the Clancy district, taken 
over some time ago by a party of Eastern and Western 
capitalists in the name of a company incorporated as the 
Calumet & Montana, has been closed down, pending the 
adjustment of some difficulties which have arisen over 
financial matters. 

NEW YORK 

Political Situation- Causes Inactive Markets.— Reor- 
ganization of Mining Companies. — The Copper Situ- 
ation. 

The centres of interest east of the Mississippi river dur- 
ing the past fortnight have been Chicago and Baltimore, 
with such financial centres as New York. Boston, and Phil- 
adelphia marking time in a rather dispirited manner. The 
] political atmosphere is considerably overcharged, and almost 
anything may be expected. Market activity has come to 
an almost complete standstill. Such developments as have 
occurred have been without any great public interest. In 
the reorganization of Ohio Copper, which is to be' made 
over into the Ohio Copper Mining Co., with the capital 
stock of the company cut in two by the reduction in par 
value from $10 to $5, the present stockholders are to 
have the privilege of exchanging their holdings for new 
stock upon the payment of $1 per share to the old com- 
pany. The Ileinze interest is to be reduced, though 'F. 
Augustus' retains his seat at the directors' table. Tin- 
new company is to be headed by W. 0. Allison, president 
of the National Reserve Bank of New York. The new 
'company, if all of the shareholders take care of their as- 
sessments, will start out with a cash balance of $.'!">0,000, 
which will put Ohio Copper in considerably better financial 
shape than has been the case for some time under the Heinze 
regime. Some of the bondholders are much dissatisfied, as 
the floating debt is to be paid off at 100 cents on the 
dollar, while the bonds set nothing. The Old Alpha Copper 
Co.. near Somerville, New Jersey. ha_s once more changed 
hands, this time at sheriff's sale under a mortgage held 
by the Manhattan Trust Co. of New York. This old copper 
mine has been in many hands, and its career is a mucli- 
ebeckered one. Enough money has been spent in the vari- 
ous attempts to produce copper from it at profit to have 
made a real copper mine in almost any of the copper dis- 
tricts of the West or Southwest. The sheriff sold the prop- 
erty to the new owner for the sum of $5000. It is an- 
nounced that one of the preliminary consolidations in the 
Cripple Creek district is completed as to details, and that 
the El Paso Consolidated, the Mary McKinney. and the 
Henry Adney are to be consolidated as a first step in 
the general merger that is to take in all of the important 
properties tapped by the Roosevelt tunnel. Some big mill 
plans are being prepared, and the treating of the low-grade 
ores will be done at the lowest possible cost. The new 
concern is to be called the El Paso Consolidated Cold Min- 
ing Co. The United Verde Extension is to go through 
another reorganization. Jerome. Arizona, seems to be des- 
tined to remain a one-mine cam]). The United Verde Ex- 
tension and the other properties which surround W. A. 
Clark's mine have been in course of development for a 
long time with very little progress apparent. 

The copper situation remains for the most part un- 
changed, with a record production from many important 
properties. The Utah Copper in May made its highest 
record in the life of the property, outputting 10,068,336 lb. 
Nevada Consolidated production is running well above 
(5.000,000 lh. But notwithstanding these figures, copper au- 
thorities state that a further decrease in copper stocks 
may be expected in June. From which it is evident that 
the most important element in the copper situation at the 
present time is the unknown amount of copper which is 
held in t he refineries. It is a little too much to ask the 



public to believe that copper stocks can continue to shrink 
in the face of increased production, when in all other lines 
there has not been any more of a marked business revival 
than has yet occurred. While it. is admitted upon all 
sides that manufacturers in Germany are — and have been 
for some time — going at top speed, it is also recognized 
that that country is very much overextended, and looking 
ahead as copper producers and selling agents do. a market 
reaction is to be expected in that quarter, rather than a 
continuation of the present high pressure. Last week showed 
a vicious drive at the copper metal market, and many- 
stories were started to account for the break said to be 
about to make its appearance. Among other yams that 
were revamped was the old one to the effect that the 
Tanganyika Concessions had a huge amount of copper 
about to be released from storage. This yarn is some- 
thing of an old favorite in London, though it never has 
had any very serious consideration from those who are 
familiar with 'Tanks,' as the issue is known in the 
'House.' The increased price in copper metal has given 
engineers some new and interesting problems to work out. 
One item is a saving in initial expense by using copper- 
clad steel wire in high-tension transmission. There is no 
development or line of industry in which the public is 
taking greater interest than that of hydro-electric power, 
and the transmission of electrical energy generally. While 
the idea is not welcomed by the coal roads that haul an- 
thracite into New York, still there are to be found engi- 
neers who claim that it would be cheaper to transform the 
coal into power and transmit it to centres such as New 
York than it is to maintain a railroad to haul the coal. 
Experiments are said to show that a copper-clad steel 
wire, 0.S in. diam.. in which the amount of copper is a 
comparatively small item, costs no more per mile than a 
solid-copper wire V-> in. diam.. and that more than twice 
as much power can be transmitted. Construction costs are 
much cheaper, as steel has a greater tensile strength, and 
supports can be placed at wider intervals. It is a rather 
favorable phase of the situation that, while the uses of 
copper multiply, the use of substitutes and methods for 
saving copper should also increase. 

Among those unfortunates who were lost at sea in the 
wreck of the Titanic was Edgar J. Meyer, of the house 
of Eugene Meyer. Jr.. ft Co. The late Mr. Meyer was 
a member of the board of directors of the Braden Copper 
Co.. and his house has always been looked upon in the 
Street as a connecting link between the Guggenheim in- 
terests and the house of J. P. Morgan & Co. Stephen 
Birch, until recently in charge of the Bonanza mines in 
Alaska, controlled by the Guggenheim-Morgan syndicate, 
has just been elected to the Braden board to fill the place 
left vacant by the death of Mr. Meyer. Pope Yeatman. 
consulting engineer for the Guggenheims, is returning this 
week from Chile. South America, and detailed figures as 
to the developed tonnage of the Braden are expected. The 
Guggenheims expect Braden to he one of the low-cost 
producers of copper, and if prophecies in this direc- 
tion materialize, interests in South American copper prop- 
erties should be augmented. It was recently reported that 
J. B. Haggin and his associates had undertaken the de- 
velopment of a property in Peru that was to rival or 
exceed in importance the Cerro de Pasco mine, controlled 
by Mr. Haggin, J. P. Morgan, the estate of the late D. 
O. Mills, and one or two associates. Inquiries at Mr. Hag- 
gin's headquarters, however, developed the fact that noth- 
ing of the kind has been undertaken. The Tennessee Cop- 
per Co., it is annonncd semi-officially. is to pay a quar- 
terly dividend of $1. With the completion of its sul- 
phuric acid plant practically at hand. Tennessee Copper 
will undoubtedly remain in the dividend list for a long 
time to come. The British Columbia Copper Co. is oper- 
ating under full swing and is earning some $60,000 net 
monthly. Last month the company moved 240.000 tons of 
ore at one blast. This is held to l>e something of a record 
for blasting operations in mining, although larger quantities 
of material have undoubtedly been moved in railroad con- 
struction, by the use of giant powder. 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



25 



General Mining News 

ALASKA 

Fairbanks 

The mill at the Newsboy mine commenced operation in 
June and is treating 15 tons of ore per day. This ore 
comes from a 4-ft. vein which is worked from both the 
115 and 215-ft. levels. 

Kenai Peninsula 
The Kenai Dredging Co., which owns a group of claims 
on Kenai river near Seward, has ordered a dredge for 
delivery on the company's property this season. Pros- 
pecting has proved the profitable gravel on the claims 
to be deeper than 25 feet. 

ARIZONA 

Gila County 

(Special Correspondence.) — The Inspiration Con. Copper 
Co. is sinking three development shafts and one working 
shaft, and is opening the Inspiration orebody by drifts 
and raises. The development of the Live Oak orebody 
will begin as soon as the sinking of development shafts 
No. 1 and No. 2 is finished. The working shaft is being 
temporarily retimbered with 8-in. timbers. After it reaches 
the desired depth it will be lined with concrete, beginning 
at the bottom and working upward, removing the timber- 
ing as the concrete is poured. There will be three com- 
partments, each 5 ft. 11 in. by 5 ft. 6 in., and the con- 
crete walls will be 10 in. thick. It is being sunk on 
contract, there being three shifts with six men on each. 
A 25-hp. gasoline hoist is being used for sinking. About 
480 men are employed. At the Miami concentrator, addi- 
tional rolls are to be placed in the crushing plant so 
that all ore will be reduced to %-in. size before going 
to the mill-bins. The new rolls, which are expected soon, 
will be 15 by 42-in. spring rolls of unusually heavy con- 
struction, specially built by the Traylor Engineering Co. 
All the rigid rolls now in use will he gradually replaced. 
The Chilean mills will be replaced by Hardinge conical 
pebble-mills. While the cost of steel and pebbles con- 
sumed by the latter is said to be about the same as that 
of steel for the former, the repair cost of the Chilean 
mills far exceeds that of the Hardinge mills.. 

F. A. Woodward, of Boston, vice-president and general 
manager for the Iron Cap Copper Co., is inspecting the 
Iron Cap mine at Copper Hill, preparatory to resuming 
development. The mine, which adjoins the Coper Hill 
mine of the Arizona Commercial, was closed in 1010 owing 
to exhaustion of funds of the National Mining Explora- 
tion Co. The Iron Cap Copper Co. is virtually a reor- 
ganization of that company and is capitalized for 200,000 
shares, par value $10, of which 85.000 shares are out- 
standing, the rest being treasury stock. There is also 
outstanding a $50,000 bond issue. Mr. Woodward states 
that there is sufficient money in the treasury to carry 
on development during the coming year. A second shift 
has been put on at the Copper Reef mine, 12 miles south 
of San Carlos, and 22 men are now employed. The Cali- 
fornia adit is in 1005 ft., and has just cut what is be- 
lieved may be the Daylight vein, having passed out of 
the limestone into a vein of porphyry and clay gouge car- 
rying considerable calcite, red hematite, and manganese. 
The drift on the California vein is in 175 ft. in well 
mineralized matter. A fault was encountered at 165 ft., 
and the drift is still in this faulted zone, the amount of 
displacement being yet undetermined. 
Globe, June 27. 

Pinal Couxty 
(Special Correspondence.) — At the old Queen mine, oper- 
ated by the Magma Copper Co. at Superior, a large shoot 
of high-grade copper ore has been opened on the 650 
and 800-ft. levels. On the 650-ft. level it was 150 ft. 
long and 5 ft. wide. In the 800-ft. level it is from 5 
to 20 ft. wide, and has been opened for a length of 



nearly 300 ft., with neither end in sight. The ore from 
development is being shipped and averages from 20 to 
25% copper and considerable silver. Two cars averaged 
over 50% copper. The copper occurs as chalcocite and 
bornite. The mine was taken over on the advice of Henry 
Krumb, about two years ago, by the Gunn-Thompson 
Co., which organized the Magma Copper Co. and started 
development. Results have exceeded expectations, and the 
mine bids fair to become a rich producer. 
Globe, June 27. 

Santa Cruz County 

The R. R. R. mine, recently purchased by N. L. Amster, 
has commenced shipments to the Copper Queen smelter 
at Douglas at the rate of 40 tons per day. This ore, 
which is expected to run over 10% copper, is taken from 
a cross-cut at the 260-ft. level from an orebody 10 ft. in 
width. The output will be increased and by September 1 
shipments of 100 tons per day are expected. 

Yavapai County 

The Mildred mine, near Stanton, in the southern part 
of the county, has found a rich body of ore in a cross- 



MAP OF ARIZONA. 

cut from the shaft. The vein, which is 5 ft. wide, was 
cut .'500 ft. below a well defined outcrop. The ore is made 
up of galena and other sulphides, with some gold and 
silver. The property is equipped with a 10-stamp mill, 
with amalgamation plates and concentration tables. The 
management intends to install an aerial tramway from 
the shaft to the mill to carry the ore automatically through 
the plant with one handling. Some of the ore in the 
mine is rich enough to ship, but the company is planning 
to construct a cyanide plant if a test-run on the ore shows 
that an improved saving could be made by this process. 
Yuma County 
The D. & W. Mining Co. has enough ore in sight on 
its property to warrant the construction of a mill, accord- 
ing to a report made by John W. Fink, president of 
the company, to the stockholders. The mine, which is 
18 miles northwest of Parker, has more than 3500 ft. of 
underground work completed and a large supply of ore 
opened on five levels to a depth of 700 ft. Every level 
is well timbered, is in good condition, and is ready for 
sloping. Air lines of iron pipes have been laid to sup- 
ply the drills, and tracks have been laid in the levels for 
tramming the ore to the shaft. The mechanical equipment 
includes one Ingersoll-Rand, class 'J', two-stage air-com- 




26 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



pressor, driven by a 42-hp. Commercial company gas en- 
gine, using distillate; one Western Gas Engine Co. 18-hp. 
single-drum hoisting engine, with 1000 ft. of %-in. steel 
cable; buckets, and cars; a Buffalo blower driven by a 5- 
hp. vertical gas-engine, with full e«|uipment of pipes for 
ventilating the various levels; a Knowles pnmp and piping 
to lift the water from the third level of the mine to the 
surface. The mine was closed on June 1, but is' ready 
to resume operation on the completion of the mill. 

CALIFORNIA 

Alpine County 

The Curtz Con. M. Co. has purchased the adjoining prop* 
erty of the Alpine Mining Co., which consisted of four 
partly developed mining claims, an aerial tramway, three- 
fourths of a mile in length, witli a 100-ton stamp-mill; 
cyanide plant, dam, and power-plant on the Main Carson 
river. The Curtz company intends to develop more power 
and transmit it to Mogul, where a concentrator will be 
built nil its property, t«i treat the ore now developed in 
its mines. There are two orebodies. one 40 and the other 
60 ft. wide, which have been opened for 600 ft. in length, 
at depths ranging from 200 to 500 ft. This development 
has been carried on for four years, and over 6000 ft. of 
adits, shafts, and drifts completed. The ore carries cop- 
per, gold, and silver in sufficient quantity to warrant treat- 
ment by concentration. 

Eldorado County 

The Beebe mine, in the townsite of Georgetown, has 
discovered a body of Iiigh-grade cold ore. This property 
adjoins the Eureka mine and is on a continuation of the 
Eureka vein. Two days before the discovery of the ore 
ii wag bonded to Eastern capitalists for $60,000. The 
Bright Hope mine, a mile north of Georgetown, is being 
operated, and the owners plan to build a mill on their 
property this summer. 

Plumas County 

The Altona mine has been purchased by a syndicate 
headed by George H. Stephens of Seattle. The Altona 
was bonded several months ago and development lias been 
in progress since then. The adit was repaired, the old 
tracks torn out, to be replaced by new equipment, and 
a station cut for a new hoist which has been placed. The 
sinking of a shaft on the richest of three veins in the 
mine, was begun, and a depth of 40 ft. has been reached. 
Engineers have examined the various veins and old work- 
ings of the mine for the purchasers. The mine when for- 
merly operated was stoped to the surface, and future de- 
velopment must begin with sinking on the ore. 

The Droege Mining Co. has given a contract to the In- 
dian Valley Electric Light & Bower Co. for electric power. 
This power will be available for the Droege and other 
mines within two months. A temporary steam plant will 
be installed as an auxiliary to the present hydro-eled ric 
plant at Greenville. The steam plant will develop 200 bra 
It is expected, within a few months, to have power in 
the district from the Seneca plant to be built on the north 
fork of the Feather rivet by the Indian Valley company. 
Tuolumne County 

The Tonopah Belmont Development Co.. of Tonopah, 
Nevada, has purchased the Dreison mine, near Tuolumne. 
California. 

IDAHO 

COEUR D'ALENE 

The Bunker Hill & Sullivan M. & C. Co. has c pleted 

the acquirement of patent to about 50 claims in addition 
to its present territory. Most of these are part of what 
is known as the Yreka lode, near Kellogg peak, in the 
Coeur d'Alene. and have been located by the corporation 
during the past few years. All are supposed to cover 
mineral ground. As a result of explorations during re- 
cent years, the geology of the Bunker Hill district has 
become much better established. At first the peculiar posi- 
tion of ore, which was found in immense lenses lying 
outside of the hanging wall of the vein, as well as in 



the fissure proper, was supposed to indicate a zone of 
some width which carries all the ore. Later the under- 
ground work proved that the conditions were due to a 
double series of fissures, combined with faulting, which 
crossed each other at right angles. Acting with this knowl- 
edge, the Bunker Hill has proceeded during the past two 
years to acquire by purchase and location ground pre- 
viously supposed to be barren, but which covered the gen- 
eral trend of the blind fissures discovered crossing the 
known system. Some of these are now in the group pat- 
ented. 

Nez Perce County 

The Gilmore Mining Co. has let a contract for work 
on the adit, the terms of which call for the completion of 
the contract within four months. This adit is started in 
the Gilmore ground and then cuts under some of the 
property of the Pittsbtirg-Idaho and into the Gilmore 
ground again, giving a depth at the greatest elevation of 
from 1.300 to 1400 ft. By the end of this month there 
will be completed 800 ft. of the total 2100 ft. When the 
new contract work starts, it will lie possible to work three 
faces as a drift from the 250-ft. level of the mine, which 
will by that time be to the adit line and thus afford an 
Opportunity for work in that part of the ground. This 
adit will be used for exploration and transportation by 
Wie two properties. 

The Gilmore company is shipping about one 50-ton car 
per week, the ore being taken out in the course of develop- 
ment. The returns have been showing about $15 per 
ton, but Mr. Johnson says that the car now on the road 
probably will net $30. This is a gold ore. The Pittsburg- 
Idaho is shipping about 100 tons per day. and the veins 
are reported as showing satisfactory orebodies with depth. 
Shoshone County 

The Snowstorm Mining Co. is preparing to resume sink- 
ing in the winze from the No. 3 adit. A new sinking pump 
has been ordered, and work will be commenced as soon as 
it arrives. This work was started last year, and ore was 
found at a depth of SO ft. It is also intended to drive a 
raise from the No. 4 adit level to prospect this orebody. 
Plans are being drawn for another unit to be added to the 
mill. Steady shipments of concentrate are now being made 
to the smelter. 

MONTANA 

Silverbow County 
(Special Correspondence.) — The experimental plan! at 
the Washoe smelter, for the trial of the Bradley process 
on the concentrator siime. has been closed in order that 
certain mechanical changes may be made. The principal 
trouble has been with the dryers, which have not been able 
to handle the slime and get it in proper condition for the 
roasters. The Davis-Daly Copper CO. has filed a state- 
ment with the county assessor for the year ended May 31. 

Tl ut put for the year w as 14,235 tons, with a gross 

yield per Ion of $6.80. There was an operating loss for 
the year of $96,721.53, but the work of the first four 
months of the year involved heavy and unusual expense, 
which included the building of a tramway and the con- 
struction of ore-bins at the mine and at the railroad 
switch. In the last six months of the year the returns 
from .ire shipments balanced the expenses. The report of 
the Bulte-Alex Scott company shows that 25.756 tons of 
ore was mined in the year prior to June L The value of 
this ore was $15.14 per ton. The total cost of mining 
and development was $5.17 per ton. of transportation 
$0,159, and of treatment $3.18. The net profit for the 
year was $9L584.97. The Butte Central Copper Co.. which 
has operated the Ophir mine, has also filed its report. AH 
the ore taken out was mined in the progress of develop- 
ment, and no attempt was made to do actual mining. 
The annual statement of the Butte & Superior Copper 
Co. shows a loss of $358,013. OS. as compared with net 
earnings for the preceding year of $3722.26. The output 
was 171.706 tons of ore with a value of $7.45 per ton. 
The cost of minium was $7.89, of transportation $1.54. and 
of reduction $9.43 per ton. At present the new concen- 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



27 



trator is treating from 300 to 500 tons per day, and the 
operating costs will undoubtedly be reduced. The Butte- 
Duluth has been incorporated in Butte, by local men, with 
a capital of $250,000. The company is supposed to have 
a lease and bond on a group of claims southeast of the 
p]ast Butte property. Several years ago these claims 
were under option to the Lewisohns, who turned them down 
after an examination made by J. Parke Channing. 
Butte, July 1. 

The report of the Tuolumne Copper Mining Co. for the 
year ended June 1 shows that the company mined during 
that period 34,324 tons of ore of an average value of $1:! 
per ton. Net earnings were $24,71)8, a decrease of $91,847 
from the preceding year. The cost for mining was $3.53 
per ton, and for the reduction of the ore at the Washoe 
smelter $4.56 per ton. The cost of labor was $40,954, 
of machinery $05,657, and of supplies $53,572. After 
making a deduction for improvements, the report shows 
that the company operated at a loss of $67,078 for the 
year. 

NEVADA 

Churchill County 
The Nevada Hills M. Co. has given the International 
S. & R. Co. a contract for the smelting of the concen-, 
trate produced in the Nevada Hills mill, and two carloads 
have been shipped to Tooele. This product is expected 
to carry about 600 oz. of silver per ton. 

Clark County 

The property of Hie Quartette Mining Co. has been 
taken over, under lease, by C. H. Jones, formerly fore- 
man and superintendent for the company. The mine has 
been operated by a few lessees for some time, and Mr. 
Jones intends to sublet as many new blocks of ground 
as possible. At the mill 20 stamps have been dropping, 
and it is reported that enough ore is now in sight to 
keep the mill in operation throughout the summer. A 
cyanide slime plant with a capacity of 50 tons per day 
is working in connection with the mill. 

Esmeralda County 

(Telegraphic Correspondence.) — The production of the 
Goldfield Con. Mines Co. for June is estimated at 32,30(1 
tons. The gross value of this output was $542,000, and 
the operating expenses $200,000 leaving $342,000 as the 
estimated net earnings for the month. 

Goldfield, July 2. 

Lyon County 
The Mason Valley Mines Co. has reported the output 
of the smelter at Yerington for the first five months of 
operation as follows, in pounds of copper: 



January 700,135 

February 1,013,601 

, March 1,285,543 

April 1,582,164 

May (estimated) 1,600.000 



Total 6,100,443 



This plant was started in January with one furnace, and 
the increased production since then is largely due to the 
favorable ore treated. The company is now handling 800 
tons per day on an estimated capacity of 400 tons. The 
management has not yet determined the proper charge 
for depreciation of the smelter, so that no definite figure 
as to the cost per pound can be given. In addition to 
depreciation, there must also be charged to the sinking 
fund, as provided in the company's mortgage, 20c. per 
ton of ore. The matte has been shipped to the A. S. & 
R. Co., which has a contract for (he treatment and sale 
of the product of the Mason Valley plant. 

Nye County 

The Tonopah Merger Mining Co. has cut a promising 
vein in the Golden Anchor shaft at a depth of 940 ft. 
Since the company resumed the sinking of the shaft from 
the 840-ft. level it has been carried down in a well min- 
eralized formation with small stringers of quartz. These 



stringers gradually widened into an almost solid orebodv, 
through .which the shaft has been driven for 20 ft. without 
cutting the foot-wall of the vein, which has a general 
cast and west course, dipping north at an angle of 35°. 
The importance of this discovery comes from the fact 
that the Golden Anchor shaft is several hundred feet out- 
side of the proved ore-zone, being about 900 ft. west of 
(he workings of the Midway, and about 900 ft. north of 
the Tonopah Extension shaft. The vein occurs in rhyo- 
lite, above the trachyte formation. Samples from the 
quartz stringers have given assay returns of $50 to $390 
pel- Ion. and (he whole body of the vein would yield mill- 
ing ore. Sinking will be continued to the 1050-ft. level, 
in the hope of cutting other orebodies. The new concen- 
trating plant of the West End Con. M. Co. is ready to 
operate. This addition has been built on the north side 
of the mill and contains 4 Callow cones, through which 
will pass (he product of the tube-mills, from there to be 
distributed to 12 Deister tables. The tailing from these 
I. -ililes will be pumped hack to the Dorr classifier, and 
from there will go to the cyanide plant. It is expected 
that (In 1 capacity of the mill will be increased 20% by 
these additions, and that the plant will be able to treat 
a better grade of ore with a higher recovery. A reduc- 
tion in the milling cost is also anticipated. It is planned 
to eventually increase the plant to a capacity of 150 tons 
per day. which can be done without installing any additional 
regrinding machinery. Al the Tonopah Belmont property 
the hoisting of ore from the main shaft commenced on 
June 30. and (he crushing plant of the new mill was 
started the next day. The ore-bins at the crusher plant 
have a. capacity of 1000 Ions, and the mill-bins have a 
capacity of 2000 tons. The latter will be tilled before the 
mill is started. 

A world's championship drilling contest, for a prize 
of $1000, was one of the features of the Fourth of July 
at Tonopah. The second prize was $400, together with 
the entrance fees of the contestants at $10 per hammer. 

NEW MEXICO 

Grant County 
The Battleship Mining Co. has filed incorporation papers 
with a capitalization of $500,000. The incorporators and 
directors are R. M. Henningsen, Frank Oliver, Drew 
Pruitt, and E. Oliver, of Los Angeles, and James T. 
O'Hara, of Lordsburg. 

Lincoln County 

The Cat mine, in the White Oaks district, is prepar- 
ing to build a mill for the treatment of its ores. Devel- 
opment has been in progress for some time, a pipe-line 
lor a water supply has been built, and a coal seam has 
been opened to supply the mill with fuel. 

Socorro County 

(Special Correspondence.) — The output of the Ernest- 
ine Mining Co. for the first 10 days of June amounted 
to 11,300 oz. of bullion, and 51/2 tons of concentrate, from 
a daily treatment of 100 tons. The mill of the Deadwood 
Mines Co., handling an average of 60 tons of ore daily, 
produced 4375 oz. gold and silver bullion, with about 2Yo 
tons of concentrate during the same period. The Ernes- 
tine company has placed a new triplex electrically driven 
pump in the mill to handle the battery solution, replac- 
ing a steam pump formerly used. The adit at the Pacific 
mine of the Oaks Co. is in 510 ft., and the vein shows 
an 8-ft. width of good ore. The South shaft is now 
187 ft. deep. Development in the last two weeks pro- 
duced 80 tons of ore averaging $21 per ton. 

Mogollon, June 28. 

Incorporation papers have been filed by the Mines & 
Metal Co. of Socorro, with capitalization of $120,000. The 
incorporators are J. L. Terry, John A. McDonald, W. R. 
Dobson, James Redmond, and Joseph Brown, of Kelly, 
and H. M. Dougherty, of Socorro. The company will 
operate at Kelly and Magdalena, Socorro county. The 
directors are J. L. Terry, John A. McDonald, and H. M. 
Dougherty. 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



UTAH 

Beaver County 
The Mines Development Co. has taken a bond and lease 
for four years, from April 1. 1912, on the Atlas prop- 
erty. The company was organized to search for a mining 
property which has a large tonnage of low-grade ore which 
could be treated by the Kidder dry-concentration process, 
and the officials believe that the ore of the Atlas mine 
can be successfully treated by this method. A deep shaft 
is being sunk, and there is already developed about 10,000 
tons of milling ore which averages 10% lead, 8 oz. of 
silver, and 50c. in gold per ton. Tests have been made 
by J. W. Thompson, of Park City, and from the results 
a mill has been planned with 100 tons daily capacity. It 
is estimated that 85% of the lead and 80% of the silver 
can be saved by the Kidder process, with a ratio of con- 
centration of four into one. This would yield 25 tons 
of concentrate daily, with an average value of $37.50 per 
ton. 

Salt Lake County 
The Utah-Apex Mining Co. is producing from 100 to 
125 tons of shipping ore and about 50 tons of concentrate 
per day. The high-grade ore comes from the Parvcnue 




MINE OF UTAH-APEX M1N1NC, CO. 



adit-level, which is now 3200 It. long and has attained a 
depth of about 1000 ft. The milling ore comes from the 
two levels above this adit, and is treated in the company's 
mill. The rirst-class ore and the concentrate are both sent 
to the Murray plant of the American S. & R. Co. The 
Parvenue adit is now being equipped for electric haulage. 
Two electric locomotives have been purchased, and the 
management expects to handle an increased output at re- 
duced cost on account of this improvement in transpor- 
tation facilities. 

Summit County 
The Utah Ore Sampling Co., which was organized in 
Salt Lake City for the purpose of taking over the Taylor 
& Brunton mill at Murray, the Pioneer sampling plant at 
Sandy, and the Silver City mill in the Tintic district, has 
now purchased the Mcintosh ore-sampling mill at Park 
City. This plant, although one of the oldest in the State, 
is in good condition, and has a capacity of 500 tons per 
dav. 

WASHINGTON 

Ferry County 
(Special Correspondence.) — The new mill of the San 
Poil Con. M. Co., which is ready for operation, will give 
the district of Republic two modern mills for the treatment 
of the large reserves of low-grade ore left in the mines 
after shipping rich ore out of the district for smelting. 
The first mill, owned by the North Washington P. & R. 
Co., was described in the Mining and Scientific Press in 
the issue of July S, 1011. The new mill of the San Poil 
company differs from the North Washington plant chiefly 
in the coarse-crushing department. Here a Williams pul- 
verizer is used, treating the mine-run ore and reducing 



it to 3/16-in. at one operation. This machine consists of 
a trommel with ,'i2 swinging hammers on the central shaft. 
The trommel, which is about ft. long, exclusive of driv- 
ing pulleys and discharge spout, is made of 1 by 2-in. 
ban set 3/10 in. apart. The hammers, which revolve about 
2 in. inside these bars, are rectangular pieces of special 
steel, about .'i by 3 by 4 m., each being attached to a 
collar on the central shaft with several links of chain 
and a pin. The central shaft with the hammers revolves 
at 000 r.p.m. while the trommel revolves at 100 r.p.m. in 
the same direction. Prom trial runs it is claimed that 
25 hp. is required to start the crusher and 22 hp. to 
keep it running when once started. The output is esti- 
mated from trials at 20 tons per hour, and the full capac- 
ity of the mill. 125 tons per day. will be crushed in one 
shift, leaving the remaining time for repairs if necessary. 
The product of this crusher will be treated by rolls and 
then by a spitzlutte. The heavy pulp from this classifier 
will go to a tube-mill, and the overflow to a Dorr thick- 
ener. An Oliver filter will be used. 
Republic, June 29. 

The Faithful Surprise Mining Co. has developed two 
veins, both of which have been intersected by an adit 1208 
ft. long. No. 1 vein was cut at a distance of about 400 
ft. in from the portal, at a depth on the pitch of 440 ft. 
The ore found is free-milling gold quartz, of an average 
assay value of about $8 per ton. Two other levels were 
opened in the same vein, higher up the hill, and some ore 
was shipped which assayed $1(5.85 per ton. The No. 2 
vein, at the end of the adit, is iron sulphide, of an aver- 
age value of $22.15 per ton. and the depth is somewhat 
over 500 ft. On the No. 1 vein drifts have been driven 
over 1000 ft. and pockets of ore were found that assayed 
thousands of dollars per ton. 

Pierce County 

(Special Correspondence.) — The plant of the Taconia 
Smelting Co. is being overhauled and enlarged. A new 
copper blast-furnace is under construction, and work on 
another will be started as soon as the first is ready for 
operation. These new furnaces will be larger than those 
in present use, and will have 00% greater tuyere area. 
Only the two copper furnaces are now in operation, the 
lead plant is shut down and partly dismantled. One basic 
converter handles the output of these furnaces, and the 
shells of the old acid converters have been discarded. The 
electrolytic refinery treats about 30 tons of blister copper 
per day, and the rest of the product is sent to Eastern 
refineries. 

Tacoma. June 28. 

CANADA 

British Columbia 

The Provincial Bureau of Mines has arranged to make 
assays for platinum free of charge, within the reasonable 
requirements of prospectors, with a view toward encour- 
aging the search for this metal, which is known to exist 
in the basins of the Tulameen and Similkameen rivers. 
Platinum is worth $40 per ounce at present. The assay 
office of the Canadian Consolidated company at Rossland 
was completely destroyed by fire last week, and the appa- 
ratus was a total loss. Three diamond-drills are in use at 
the Granby company's Hidden Creek mine, in addition to 
underground work. Grading for the smelter site is also 
in progress. Work is in progress on the Duncan property, 
near Beaverdell, which is under bond to the Phoenix Min- 
ing, Smelting & Development Co., and a promising show- 
ing of high-grade silver ore is being made. The mines 
in the Boundary district have shipped a total of 912,000 
tons in 1912 to date, and the Grand Forks and Greenwood 
smelters have treated a total of 917.000 tons. 

The British Columbia Copper Co. has a force of about 
00 men employed in the development of the claims which 
it has under bond at Voigt's Cam]) on Copper mountain, 
about ten miles southwest of Princeton. Active work is 
at present being done on the 14, Ada B.. Silver Dollar, 
Triangle Fraction. Red Eagle, and on the' main, working 
adit which is to cut a number of veins east of Voigt's 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



29 



Camp. Three diamond-drills are being used at present, 
under the direction of W. J. Mitchell of the Northwest- 
ern Diamond Drill Contracting Co. Arrangements are being 
made for operating three additional machines. The ore- 
bodies at Voigt's Camp lie in a series of parallel veins run- 
ning nearly north and south. Alternating with the veins 
are a series of porphyry dikes of varying widths up to 
several hundred feet; these prophyry dikes bear an im- 
portant relation to the occurrence of the ore. There are 
some twenty of these veins, all of which carry copper, 
though all are not of working grade. The ore varies from 
a rather basic or neutral character on the eastern side 
of the series of dikes, to an acid character on the west - 
ern side. The largest amount of work has been done on 
the 14 claim, which lies to the east of the main camp. A 
wagon-road has been built to this property, and two steam 
boilers and a hoist erected. A shaft is being sunk and 
is now down over 140 ft. on the incline. From the 90-ft. 
level a cross-cut was run through very good ore, which, in 
addition to copper, carried several dollars in gold. The 
ore consists of hematite, with calcite and ehalcopyrite ; 
its peculiarity being that the hematite carries the largest 
part of the gold. Several drifts were run from the 
cross-cut. and in two of these diamond-drills are being 
operated at present, to determine the size and position 
of the orebodies. The drills are being run by steam, but 
a compressor is on the way, and compressed air will be 
available in the near future. In addition to the under- 
ground showings, several prospect shafts and a series of 
trenches show the size of the orebody. The ore can be 
reached by an adit which will have to be driven 2300 ft. 
This has been started of large size to accommodate two 
car-tracks. A diamond-drill hole has also been started at 
a point 25 ft. over the adit, which will he run in a line 
parallel to the adit, to cut all formations and not only 
prospect for ore, but also furnish information in regard to 
the rock which will be found in driving the "adit. 

The thirteenth general meeting of members of the West- 
ern branch of the Canadian Mining Institute convened at 
Greenwood, June 27, for the transaction of routine busi- 
ness, and the reading and discussion of several papers hav- 
ing particular reference to the mining industry. 

Ontario 

The excavation for the new 10-stamp mill of the Swastika 
Mining Co. has commenced. Development at the 200, 300, 
and 400-ft. levels has opened orebodies from which the 
management hopes to produce a large enough tonnage to 
warrant a future addition to the mill. 

JAPAN 

Formosa 

A rich vein of copper ore has recently been discovered 
near the port of Karen on the eastern coast of Taiwan. 
The vein is being examined by Junkichi Kusaka of the 
Sendai mine inspection office. 

MEXICO 

SONORA 

At the San Nicolas mine, south of Nacozari, a rich 
body of ore has been opened by two drifts on the 100-ft. 
level. Some of the samples taken have yielded assay re- 
turns as high as $500 per ton in gold and silver. Ship- 
ments of the ore. which is highly silicious, have been 
made to the Copper Queen smelter at Douglas, Arizona. 
The company operating the mine has the property under 
bond and lease, with an option at $75,000. A company 
was recently organized at Bisbee, Arizona, to be known 
as the Cienega Gold Mines Co.," to operate properties, in 
the Altar district, which are reported to have gold ore 
in commercial quantities. The company was capitalized 
at $20,000, and is a close corporation. The Nacozari 
Con. Copper Co. is planning to build a concentrator at 
its property adjoining the Pilares property of the Moc- 
tezuma Copper Co., at Nacozari. A sufficient tonnage of 
milling ore has been developed to supply a small mill for 
an indefinite period. 



Personal 



Professional men are invited to send news of their engage- 
ments and travels. Such news is interesting to friends. 

E. T. Dumble is here. 

Ralph Arnold has gone to New York. 

Edmund Juessen has gone to Arizona. 

E. H. Nutter has returned from Seattle. 
H. W. Turner has left London for Russia. 

W. F. Kett is at Lake Tahoe upon his vacation. 
T. H. Leggett was at Bowie, California, last week. 
Royal P. Jarvis is spending the summer in Colorado. 
J. Morgan Clements was in San Francisco this week. 

F. B. Van Horn sailed from New York for Tampico, 
July 5. 

J. W. Malcolmson has returned to Kansas City from 
Sonora. 

J. B. Hoeing has been appointed State Geologist for 
Kentucky. 

E. P. Mathewson and family spent the Fourth at Santa 
Barbara, California. 

G. L. Carlisle, Jr., has gone from Reno, Nevada, to 
Nantucket, Massachusetts. 

George J. Rockwell is manager for the El Tajo Mining 
Co., San Sebastian, Mexico. 

F. L. Garrison is visiting the Comstock and will be in 
San Francisco about July 10. 

Alfred Fox, manager of the Caylloma mine, has re- 
turned to Peru from England. 

K. Morimura and O. Takayama, of the Nippon Artesian 
Well Co., are in San Francisco. 

G. A. Swanquist is with the Butters Divisadero Co., 
Divisadero, Salvador, Central America. 

Henry Krumb is at the Keystone mine making an exami- 
nation for the Inspiration Consolidated. 

George I. Adams will be in San Francisco during the 
week and expects to sail for China on July 12. 

J. Volney Lewis will spend the greater part of the sum- 
mer visiting mining districts in the Western states. 

C. L. Severy, having completed his engagement with the 
Poderosa Mining Co., Ltd., has left Collahuasi for London. 

Henry B. Kaeding is in New York and may be addressed 
temporarily in care of the American Institute of Mining 
Engineers. 

F. Julius Fohs, after several years service as Assistant 
State Geologist of Kentucky, has retired to enter private 
consulting practice. 

Edward L. Dufourcq sailed on the Mauretama for 
England and France,- expecting to return to New York 
about the second week in August. 

Ezequiel Ordonez and J. M. Nicol have been nominated 
as rival candidates for the presidency of the Mexican In- 
stitute of Mining & Metallurgy. 

. Corey C. Brayton has resigned as manager for the rock- 
crushing department of the Natomas Consolidated, and will 
engage in gold-dredging on the Seward peninsula, Alaska, 
with headquarters at Solomon. 



Obituary 



Cecil Brunswick Smith died at his home in Toronto, 
Canada, recently. Mr. Smith, who was a graduate of 
McGill University, was 4S years old, was well known in the 
field of hydro-electric power development, having designed 
and built many important plants. A former president of 
the Canadian Society of Civil Engineers, he was the author 
of several texts on engineering, and his death is a great 
loss to the profession. 



30 



MINING AND SCIENTIFIC PRESS 



July G. 1912 



Market Reports 



LONDON QUOTATIONS 

(By cable, through the courtesy of C. S. Burton & Co., 
New York.) 

July 3. 

Camp Bird Ltd * 6J 

El Oro * 

Esperanza 7} 

Orovllle Dredging 1} 

Santa Gertrudls 7} 

Tomboy 6| 



COPPER SHARES — BOSTON 

(By courtesy of J. C. Wilson, Mills Building.) 



Closing prices, 

July 3. 

Adventure 8 9} 

Allouez 47 

Calumet <t Arizona 75} 

Calumet * Hecla 632 

Centennial 21 

Copper Range 59 

Daly West 5J 

Franklin 12 

Granby 64} 

Greene Cananea, ctf. 10$ 

Isle-Royale 34} 

La Salle 7} 

Mass Copper 7 



Closing Prices 

July 3. 

Mohawk 8 70 

North Butte 31} 

Old Dominion 57} 

Osceola 119 

CJulncy 92 

Shannon 16} 

Superior A Boston 2} 

Tamarack 43 

Trinity 6} 

Utah Con 11 

Victoria 3j 

Winona 6} 

Wolverine 112 



NEVADA STOCKS 

(By courtesy of San Francisco Stock Exchange.) 
San FranclBco, July 2. 



Atlanta 


8 .23 


Mayflower 


8 .02 


Belcher 


63 


Mexican 


2.75 


Belmont 


10.00 


Midway 


.48 






Montana-Tonopah 


2 57 


Booth 


09 


Nevada Hills 


2.05 


Chollar 


02 


Ophlr 


1.05 


Combination Fraction 


15 


Pittsburg Silver Peak 


1.05 


Con. Virginia 


49 


Bound Mountain 


.42 


Florence 


95 


Savage 


.13 






Tonopah Extension 


200 


Gould & Curry 


02 


Tonopah of Nevada 


6.65 


Jim Butler 


61 


Union 


.63 


Jumbo Extension 


37 


Vernal 


.14 


MacNamara 


.23 


West End 


1.70 












OIL SHARES 




(By courtesy of San Francisco Stock Exchange.) 






San Francisco, July 2. 




Associated Oil 


43.50 


McKlttrlck 


8 .09 


Caribou 


.91 


Parafline 


.50 


( larotuont . .. .65 


Palmer 


.53 


Coalings National 


.21 


Palmer Union 


.18 


De Luxe 


.80 


Premier 


.46 


Empire 


1.25 


Republic 


.32 


Maricopa 36 


.60 


Turner 


.87 


Maricopa National .18 


W. K. Oil 


. 2.00 



MINING STOCK QUOTATIONS — NEW YORK 

(By wire from C. S. Burton & Co.. New York.) 



Closing Prices. 

Julys. 

Amalgamated copper 8 855 

A. 8. & R. Co 86} 

Braden Copper 7} 

B. p. Copper Co 5J 

Chlno 33} 

First National 2J 

Glroux 61 

Goldneld Con 4 

Greene-Cananea 10} 

Holllnger 12| 

Inspiration 19} 

Kerr Lake 2} 

La Rose 3} 

Mason Valley 13} 

McKlnley-Darragh lj 



Closing Prices. 

July 3. 

Miami Copper I 28J 

Mines Co. of America 3} 

Nevada Con _ 22} 

Nlpi8Sing 7} 

Ohio Copper } 

Ray Con 22} 

Tenn. Copper 46} 



Tonopah Belmont 

Tonopah Ex 

Tonopah Mining 

Trinity 

Tuolumne Copper 

Utah Copper 63} 

West End 12 

Yukon Gold 3} 



10 
2 
61 
«t 
81 



ASSESSMENTS ON COMSTOCK MINES. 

Company 



Hale A- Norcross., 
Sierra Nevada ... 



Union Con., 



No. 


Del. Board 


Sale Day 


Amt. 


39 


June 29 


July 23 


.10 


30 


July 2 


July 29 


.06 


30 


July 4 


J uly 30 


.10 


41 


J uly 4 


Aug. 12 


.10 


17 


July 7 


Aug. 5 


.10 


30 


July 12 


Aug. 7 


.15 


15 


J uly 12 


Aug. 6 


.06 


69 


July 15 


Aug. 9 


.20 


23 


J uly 19 


Aug. 12 


.05 



LOCAL, METAL PRICES 

San Francisco July 3. 
San Francisco is not a primary market for the common 
metals except quicksilver. The prices quoted below there- 
fore represent sales of small lots and are not such as an 
ore-producer could expect to realize. Ore contracts usually 
call for settlements on the basis of Eastern prices, less 
freight and treatment charges. The prices quoted are In 
cents per pound, except in the case of quicksilver, which is 
quoted in dollars per flask of 75 pounds. 

Antimony 11— ll}c Ifculcksllver (flask) *3 

Electrolytic Copper 18— 18}c Tin _...60— 51}c 

Pig Lead 6.00— 5.95c I Spelter 7}— 7}o 

Zinc dust, 1400 lb. casks, per 100 lb., small lots 89.60— 9.76: large 87.50— 8.50 



METAL PRICES 

(By wire from New York.) 

NEW YORK. July 3. — Copper is now very quiet. Buyers 
are still holding off for better terms. Lead is firm and con- 
sumption is excellent. Spelter is firm and steady in price. 

Average daily prices for the past week, in cents per pound, 
based on wholesale transactions, standard brands, are given 
below. 

Electrolytic 
Date. Copper. 
June 27 17.30 

" 28 17.30 

" 29 17.30 

" 30 Sunday. 

July 1 17.30 

2 17.30 

3 17.30 



Lead. 

4.50 
4.60 
4.50 



Spelter. 

7.00 
7.00 
7.00 



Silver, 
per oz. 
61} 
fill 

61} 



No market. 
4.50 6.95 
4.50 6.95 
4.50 6.95 



61} 
61} 

m 



SII.V BR 

Below Is given the average New York quotation, in 
per ounce, of fine silver for the months indicated: 
1911. 

Jan 53.81 

Feb 52.23 

Mch 52.76 

Apr 52.32 

May 53.31 

June 53.04 



1912. 




1911. 


1912 


56.25 


July , , , 


52.57 




59.06 


Aug 


52.17 




58.37 


Sept 


52.43 




59.20 


Oct 


53.37 




60.88 




55.77 




61.34 


Dec 


54.85 





COPPER 

Daily quotations on copper as published In this column 
represent average wholesale transactions on the New York 
market and refer to electrolytic copper. Lake copper com- 
mands normally from 1-5 to l-4c. per lb. more. Below are 
average monthly quotations in cents per pound: 



1911. 

Jan 12.29 

Feb 12.26 

Mch 12.14 

Apr 12.02 

May 11.99 

June 12.39 



1912. 
14.09 
14.08 
14.68 
1 r. 7 4 
16.03 
17.23 



1911. 

July 12.47 

Aug 12.41 

Sept 12.20 

Oct 12.19 

Nov 12.61 

Dec 13.55 



1912. 



COPPER SURPLUS 

Figures showing the visible supply of copper at the be- 
ginning of each month are now widely available. Below 
are given the amounts, in pounds, known to be available at 
the first of each of certain months. 

U. S. European. 

January 1910 141,766,111 244,961.280 

January 1911 122,030,195 230,264,280 

October " 140,894,856 191,945.600 

November " 134,997,642 176,816,640 

December " 111,785,188 164,151,680 

January 1912 89,454.695 178,329.920 

February " 66.280,643 153,820,800 

March " 62,939,988 141,125.680 

April " 62,367,557 137,806,000 

May " 65,295,368 134.176,000 

June " 49,615.643 117.801,600 



UNITED STATES PRODUCTION! \\l> CONSUMPTION 

(Compiled from reports of the Copper Producers' Association) 

Domestic 

Production. deliveries. Exports. 

May, 1911 126.962.544 64.543,963 61.078,557 

June 124,554,312 61,655.561 71,460,519 

July 112,167,934 56.982,582 74.880.658 

August 125,493,667 59,935,364 69.885.660 

September 115,588,950 57,311,584 50.824,011 

October 118,255,442 64,068,656 60,084.349 

November 111,876,601 68.039,776 67.049,279 

December 122,896,697 65,988,474 79.238,716 

Total for 1911 1,431,938.338 709,611,945 754.932.733 

January 1912 119.337,753 62,343,901 80.167,904 

February 116,035,809 56.228,368 63.148.096 

March 125.694,601 67,847.556 5S.779.566 

April 125.694.001 69.513.846 53.2:»2.326 

May 126,737,836 72.702,237. 69.485.945 



July 6, 1912 



MININU and scientific press 



37 



LEAD 

Lead is quoted ordinarily in cents per pound or dollars 
per hundred pounds delivered at St. Louis or New York. 
The difference is normally 15c. per hundred pounds, and any 
larger or smaller difference is promptly met by sales. The 
daily price in New York is published each week in this col- 
umn. Below are the average quotations by months: 

1912. 1911. 1912. 

4.43 July 4.50 

4.03 Aug 4.50 

4.07 Sept 4.48 

4.20 Oct 4.27 

4.20 Nov 4.30 

4.40 Dec 4.45 



1911. 

Jan 4.48 

Feb 4.44 

Mch 4.39 

Apr 4.41 

May 4.37 

June 4.34 



ZINC 

Zinc is quoted as spelter, standard Western brands, and 
based upon St. Louis or New York delivery. While New York 
quotations, as a matter of convenience, are commonly used, 
relatively little spelter actually goes to or comes from New 
York. The bulk is shipped direct from the plants in the 
Mississippi Valley to manufacturers, due allowance being 
made for freight. New York daily quotations are published 
in this column each week. Below are given averages by 
months: 





1911. 


1912. 






5.45 


6.42 


July 


Feb. 


5.52 


6.50 


Aug. 


Mch. 


5.56 


6.57 


Sept. 




5.40 


6.63 
6.68 
6.84 


Oct 




5.35 






5.50 


Dec. 



1911. 

5.70 

5.95 

5.86 

6.10 

6.38 

Dec 6.30 



1912 



Zinc-dust is quoted separately, the price being based upon 
the cost of spelter in Illinois and the cost of preparation. 
About half the zinc-dust used in the United States is Im- 
ported through San Francisco. Delivery prices are deter- 
mined largely by quantities and contracts. 



QUICKSILVER 

The primary market for quicksilver is San Francisco, Cali- 
fornia, being the largest producer. The price is fixed in the 
open market, and, as quoted weekly in this column, is that 
at which moderate quantities are sold. Buyers by the car- 
load can usually obtain a slight reduction, and those want- 
ing but a flask or two must expect to pay a slightly higher 
price. Average monthly quotations, in dollars, per flask of 
75 lb., are given below: 



1911. 

Jan 44.60 

Feb 48.40 

Mch 52.50 

Apr 50.90 

May 46.50 

June 46.50 



1912. 
43.75 
46.00 
46.00 
42.25 
41.75 
41.30 



1911. 

July 48.00 

Aug 50.00 

Sept 47.50 

Oct 46.12 

Nov 45.50 

Dec 44.50 



1912. 



TIN 



New York prices control in the American market for tin, 
since the metal is almost entirely imported. San Francisco 
quotations, averaging about 5c. per lb. higher than New York, 
are quoted weekly in this column. Below are given average 
monthly New York quotations in cents per pound: 



1911. 1912. 

Jan 41.25 42.53 

Feb 41.61 42.96 

Mch 40.16 42.58 

Apr 42.18 43.92 

May 43.11 46.05 

June 44.61 45.40 



1911. 

July 42.40 

Aug 43.32 

Sept 39.75 

Oct 41.18 

Nov 43.12 

Dec 44.65 



1912 



Current Prices For Chemicals 



(Corrected monthly by Braun-Knecht-Heimann Co.) 
Prices quoted are for ordinary quantities in packages as 
specified. For round lots lower prices may be expected, 
while in smaller quantities advanced prices are ordinarily 
charged. Prices named are subject to fluctuation. Other 
conditions govern Mexican and foreign business. 

Min. Max. 

Acid, sulphuric, com'l, 66°, drums, ft 100 lb $0.75 81.00 

Acid, sulphuric, com'l, 66°, carboy, ft 100 lb 1.00 1.60 

Acid, sulphuric, C. P., 9-lb. bottle, bbl., ft lb 0.13 0.18 

Acid, sulphuric, C. P., bulk, carboy, ft lb 0.09} 0.12 

Acid, muriatic, com'l, carboy, ft 100 lb 1.60 3.00 

Acid, muriatic, C. P., 6-lb. bottle, bbl., ft lb 0.15 0.20 

Acid, muriatic, C. P., bulk, carboy, ft lb 0.10} 0.15 

Acid, nitric, com'l, carboy, ft 100 lb 5.25 6.50 

Acid, -nitric, C. P., 7-lb. bottle, bbl., ft lb 0.16 0.22 

Acid, nitric, C. P., bulk, carboy, ft lb 0.12} 0.15 

Argols, ground, bbl., ft lb 0.20 0.25 

Borax, cryst. and cone, bags, ft 100 lb 2.75 3.85 

Borax, powdered, bbl., ft 100 lb 3.00 4.00 



Borax glass, gd. 30 mesh, cases, tin lined, ft 100 lb 10.00 

Bone ash, 60 to 80 mesh, bbl., ft 100 lb 4.50 

Bromine, 1-lb. bottle, ft lb 0.55 

Candles, adamantine, 12 oz., 40 sets, ft case 3.50 

Candles, adamantine, 14 oz., 40 sets, ft case 4.00 

Candles, Stearic, 12 oz., 40 sets, ft case 4.95 

Candles, Stearic, 14 oz., 40 sets, ft case 4.65 

Clay, domestic fire, sack, ft 1001b 1.50 

Cyanide, 98 to 100%, 100-lb. case, ft lb 0.20} 

Cyanide, 98 to 100%, 200-lb. case, ft lb 0.20 

Cyanide, 129%, 100-lb. case, ft lb 0.27J 

Cyanide, 129%, 200-lb. case, ft lb 0.26J 

Lead acetate, brown, broken casks, ft 100 lb 8.75 

Lead acetate, white, broken casks, ft 100 lb 10.00 

Lead acetate, white, crystals, ft 100 lb 11.75 

Lead, C. P., test., gran., ft 100 lb 13.00 

Lead, C. P., sheet, ft 100 lb 15.00 

Litharge, C. P., silver free, ft 100 lb 10.50 

Litharge, com'l, ft 100 lb. 7.60 

Manganese ox., blk., dom. in bags, ft ton 20.00 

Manganese ox., blk., Caucasian, in casks, ft ton 42.50 

(85% Mn0 2 — 1% Fe) 

Nitre, double ref d, small cryst., bbl., ft 100 lb 7.00 

Nitre, double refd, granular, bbl., ft 100 lb 6.50 

Nitre, double refd, powdered, bbl., ft 100 lb 7.25 

Potassium bicarbonate, cryst., ft 100 lb 12.00 

Potassium carbonate, calcined, ft 100 lb 15.00 

Potassium permanganate, drum, ft lb 0.11 

Silica, powdered, bags, ft lb 0.03 

Soda, carbonate (ash), bbl., ft 100 lb 1.50 

Soda, bicarbonate, bbl., ft 100 lb 2.00 

Soda, caustic, ground, 98%, bbl., ft 100 lb 3.15 

Soda, caustic, solid, 98%, drums, ft 100 lb 2.65 

Zinc shavings, 850 fine, bbl., ft 100 lb 11.80 

Zinc sheet, No. 9—18 by 84. drum, ft 100 lb 10.00 



13.00 
5.50 
0.65 
4.15 
4.56 
5.50 
5.20 
2.00 
0.24} 
0.24 
0.28} 
0.27} 
9.65 
10.25 
12.25 
15.00 
18.00 
13.00 
9.00 
25.00 
60.00 

8.00 
7.50 
8.00 
15.00 
18.00 
0.124 
0.05 
1.75 
2.60 
3.60 
2.86 
13.00 
11.26 



Current Prices for Ores and Minerals 



(Corrected monthly by Atkins, Kroll & Co.) 

The prices are approximate, subject to fluctuation, and to 
variation according to quantity, quality, and delivery re- 
quired. They are quoted, except as noted, f.o.b. San Fran- 
cisco. Buying prices marked *. 

Min. Max. 

Antimony ore, 50%, ft ton *$20.00 822.60 

Arsenic, white, refined, ft lb 0.04 0.04} 

Arsenic, red, refined, ft lb 0.08 0.09 

Asbestos, according to length and quality of fibre, 

ft ton 100.00 350.00 

Asbestos, lower grades, ft ton 6.00 60.00 

Asphaltum, refined, ft ton 10.00 20.00 

Barium carbonate, precipitated, ft ton 42.50 45.00 

Barium chloride, commercial, ft ton 42.50 45.00 

Barium sulphate (barytes), prepared, ft ton 20.00 30.00 

Bismuth ore, 10% upward, ft ton *76.00 upward 

Chrome ore, according to quality, ft ton 10.00 12.50 

China clay, English, levigated, ft ton 15.00 20.00 

Cobalt metal, refined, f. o. b. London, ft lb 2.50 

Coke, foundry, ft 2240 lb 13.50 15.00 

Diamonds: 

Borts, accoruing to size and quality, ft carat 2.00 15.00 

Carbons, according to size and quality, ft carat .... 50.00 90.00 

Feldspar, ft ton 6.00 26.00 

Firebrick: 

Bauxite, ft M 175.00 

Magneslte, ft M 190.00 275.00 

Silica, ft M 42.50 47.50 

Flint pebbles for tube-mills, ft 2240 lb 19.50 22.60 

Fluorspar, ft ton 10.00 16.00 

Fullers earth, according to quality, ft ton 20.00 30.00 

Gilsonlte, ft ton 36.00 40.00 

Graphite: 

Amorphous, ft lb 0.01} 0.02} 

Crystalline, ft lb 0.04 0.13 

Gypsum, ft ton 7.60 10.00 

Infusorial earth, ft ton 10.00 16.00 

Magneslte, crude, ft ton 5.00 7.60 

Magneslte, dead calcined, ft ton 23.50 27.60 

Magneslte, brick (see firebrick). 

Manganese ore, oxide, crude, ft ton 10.00 25.00 

Manganese, prepared, according to quality, ft ton 30.00 70.00 

Mica, according to size and quality, ft lb 0.05 0.30 

Molybdenite, 95% MoS 2 , ft ton 400.00 600.00 

Monazite sand (5%thoria), ft ton 160.00 200.00 

Nickel metal, refined, ft lb 0.46 0.60 

Ochre, extra strength, levigated, ft 100 lb 2.25 3.26 

Platinum, native, crude, ft oz 40.00 46.00 

Silex lining for tube-mills ft 2240 lb 32.60 36.00 

Sulphur, crude, ft ton 15.00 26.00 

Sulphur, powdered, ft ton 40.00 46.00 

Talc, prepared, according to quality, ft ton 20.00 60.00 

Tin ore, 60%, ft ton 460.00 475.00 

Tungsten ore, 65% 390.00 . 455.00 

Vanadium ore, 15%, ft ton 150.00 180.00 

Wolframite (see tungsten ore). 

Zinc ore, 50 % up,ft ton *15.00 20.00 



32 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



Company Reports 



SILVER KING COALITION MINKS COMPANY 

This company was formed in 1902 to acquire 327 pat- 
ented mining claims, covering 2138 acres, in the Park City 
district. Utah. Thomas Kearns is general manager. Dur- 
ing the- year ended April 30, 1912, 107,893 tons of ore 
was mined, of which 86,387 was concentrated, producing 
14,10(i tons of concentrate, a ratio of concentration of 
0.12 into 1. Details of production follow: 





Dry 


Lead, 


Silver, 


Gold, 


Product. 


Tons. 


lb. 


OZ. 


oz. 


Crude ore . . . 


. .21,500 


12,194,390 


1,070.711 


1185 


Concentrate . 


. .14.101. 


9,601,137 


715,307 


1174 


Totals 


. .35,012 


21.855,527 


1 .792,078 


2359 


Sold for $] .209.82 


".03. 






Average ass 


ay value 


per ton : 










Lead, %. 


Silver, oz. 


Gold, oz. 


Crude ore . . . 




28.35 


50.00 


0.0551 


Concentrate . 




34.24 


50.71 


0.0833 



The total receipts amounted to $1,277,038, and the ex- 
penditure to $094,410, leaving an operating profit of 
$583,018. The assets of the company are valued at $0,708,- 
230. and the company is capitalized at $0,250,000. Daring 
the year the company, jointly with the Daly-Judge and 
Daly West Mining Co. purchased 700 acres of land and 
constructed an impounding dam for mill tailing. The en- 
tire flow of Silver creek is conducted through a concrete 
tlume to the dam, and the outflow is thoroughly settled 
before being allowed to escape. This will free these com- 
panies from the litigation which has harassed them in 
the past. The judgment which t he Silver King Consolidated 
Mining Co. obtained against the Coalition company has 
been appealed. Several of the larger stockholders have 
given individual bonds covering the judgment, and mean- 
while the earnings of the company are being set aside for 
the protection of the bondsmen. Development during the 
past year has explored the Uintah Treasure Hill and has 
connected the stopes on the Crescent vein with the apex. 
This latter work has proved the apex, discovered new ore- 
bodies, and provided additional ventilation and means of 
exit. The mill, sampler, and tramway are now operated by 
electric power, and operating costs have been materially re- 
duced because of this, the improved ventilation, and the 
use of hammer-drills in sloping. 

BRAKPAN MINES, LIMITED 

This company was formed in 1903 to acquire mining 
rights from the Transvaal Coal Trust Co., Ltd., of Which 
it is a subsidiary. The authorized capital is £750,01)0. 
in shares of £1 each, all being issued. Details of opera- 
tion for the year, as given in the report by W. L. Honnold, 
the consulting engineer, arc as follows: 

At the end of the year 241,204 tons had been milled, 
the average recovery being 27s. 6.5Sd. per ton as against an 
average working cost of 18s. 4.10d. These figures were 
influenced by a number of abnormal circumstances inci- 
dental to starting, chief among which were: (1) the ini- 
tial absorption of gold by the plates, tube-mills, and cya- 
nide works, estimated, owing to the influence of the Mer- 
rill and Butters processes, at only about 2400 oz.; (2) 
partial extraction of the gold contained in about 11,000 
tons of sand and slime representing the current stock of 
the cyanide plant; (3) higher cyanide residues than now 
obtain; (4) the inclusion of 31,300 tons of accumulated 
dump ore. the first 10,500 tons of which came from the 
preliminary opening of stopes and were therefore pre- 
sumably of about average grade, the remainder coming 
from the development dump and averaging probably not 
over half the value of stope ore; (5) an underestimate 
of tannage during the first months of milling, due to cer- 
tain factors not then having been definitely determined: 
this was partly offset by imperfect sorting in August. 



The net significance of the abnormal circumstances jus- 
tifies the conclusion that, had operations been on the basis 
since established, and had the ore from current develop- 
ment been normal as to quantity and value, the recovery 
would have been at least Od. per ton higher than shown. 
The working cost of 18s. 3d. per ton reached in December 
is open to further reduction. To what extent, is a matter 
of considerable uncertainty. Development for the year 
totaled 10,075 ft., averaging for the 9701 ft. on ore 10.07 
dwt. over 32.8!) in. The ore reserve was re-estimated in 
the light of milling experience, and is returned at a 
somewhat lower tonnage but higher value, namely. 1.925.- 
340 mine tons at 0.73 dwt., as against 2.035,108 tons at 
0.02 dwt. at the beginning of milling. The altered posi- 
tion, apart from the influence of milling and new devel- 
opment, is mainly due to the elimination of certain pre- 
viously included low-grade narrow areas which, in view 
of work since done, as well as because of the limitations 
of machine mining, now looks less promising. Detailed 
sampling of the stope faces as they have been advanced 
points to the gold in some sections of the mine being so 
distributed as to permit of selective mining to a greater 
extent than was at first thought practicable. 

With regard to the underground position, it seems prob- 
able that the system followed in laying out the mine will 
provide the advantages anticipated. In the matter of de- 
velopment it lias so far resulted in the opening of an 
area measuring at extreme points 2800 ft. along the strike 
by 0000 ft. in the direction of the dip, this area being 
centrally situated and affording an uncommon degree of 
evidence as to the nature and future of the property. 
From this area development can now be simultaneously 
extended in four directions, and at as many points as 
circumstances may call for. It should be borne in mind, 
however, that with levels placed so far apart as is permis- 
sible in the case of a flat-lying mine such as Brakpan. 
more time is required to render a certain developed ton- 
age effective as to stoping than in a mine having closely 
spaced levels. Perhaps equal effectiveness in this respect 
will never be realized. Furthermore, it is probable that 
with the ore reserve developed in such large blocks it would 
be difficult, until a surplus of stopes were available, to 
maintain the regularity of output heretofore aimed at on 
the Rand. 

These restrictions, however, quite apart from their 
more or less transitory bearing, seem relatively unimpor- 
tant in view of the fact that, for a given expenditure on 
development, a much more comprehensive and, on the 
whole, more stable position is secured, as well as certain 
advantages from the standpoint of working. In the mat- 
ter of breaking and handling ore it has been necessary, 
in face of the somewhat unusual conditions which prevail, 
to adopt certain methods not commonly in practice here. 
The application of these called for and still calls for a 
guarded but to some extent experimental attitude. Much 
progress has been made, however, and it now seems that 
the initial difficulties will prove of even less importance 
than anticipated. A point of notable significance is that, 
owing mainly to the comparatively large reef width and 
favorable dip conditions, it has been found practicable to 
utilize machine-drills to a much greater extent than ex- 
pected, thus relieving an otherwise serious labor shortage. 

The equipment promises to fully meet expectations. More 
time will be required, however, before a definite statement 
will be possible as to the advantages of its various fea- 
tures, particularly those involving a departure from pre- 
vious practice. 

Capital expenditure has exceeded expectations to about 
£50, 000, say 4 a /2% of the amount involved. This is due 
partly to the fact that at the earlier date construction was 
at a stage which precluded exact analysis, partly to the 
delay in starting milling, and partly to certain unforeseen 
requirements, more particularly the additional compressed 
air and machine-drill equipment called for in consequence 
of the recognition that only by adopting machine mining 
to an almost' exclusive extent could the best results be 
secured from the labor available. 



July 6, 1912 



MINING AND SCIENTIFIC PRtSS 



33 



Book Reviews 

Any of the books noticed in this column are for sale by, 
or can be procured from, the Mining and Scientific Press. 



How to Live in Tropical Africa. By J. Murray, M.D. 
Second edition. Pp. 315. 111. The African World, Lon- 
don, 1912. For sale by the Mining and Scientific Press. 
Price $1.40. 

This volume, published by The African World, will be of 
great service and convenience to engineers who may be 
called upon to visit tropical countries for longer or shorter 
periods. Much has been written concerning sanitation and 
hygiene in tropical countries, but the material is widely 
scattered, and the engineer who is called upon to 'brush up' 
on these problems will be grateful to Dr. Murray for so con- 
cise and comprehensive a summary. The book is not a mere 
manual of direction, but briefly and lucidly discusses under- 
lying principles, and will be correspondingly serviceable to 
engineers in other countries than Africa. Much of the in- 
formation is, indeed, of general service, and the book will 
be a useful addition to any engineer's library. 



Principles of Insurance. By W. F. Gephardt. Pp. 
313. The Macmillan Company, New York, 1911. For sale 
by the Mining and Scientific Press. Price $1.60. 

Social development is gradually making insurance a prime 
factor of modern life. The growth of insurance companies, 
spread of fraternal and benefit associations, and, more re- 
cently, the expansion of liability insurance, have made it 
desirable that the ordinary citizen should be possessed of 
an elementary knowledge of the fundamentals of insurance. 
But even the policy-holders of insurance companies usually 
are devoid of any clear conceptions of the principles of 
insurance, nor are agents usually able to inform them, as 
their attention is devoted to securing applicants rather than 
enlightening them. Mr. Gephardt, who is an assistant 
professor in Ohio State University and a former insurance 
salesman, writes lucidly for students and general readers, 
who will be grateful to him for his clear exposition of the 
theory of life insurance; mortality tables; the selection of 
lives; the company; the premium; policies; reserve, surplus, 
and dividends; investments and interests; the relation of 
the state to insurance; insurance for the wage-earner; and 
accident and health insurance. The volume concludes with 
a brief bibliography of insurance which will be useful to 
those who may wish to push their study of the matter fur- 
ther. The chapter on insurance for the wage-earner con- 
tains an excellent discussion on employers' liability, both 
in America and abroad, and of pension systems, which will 
he of much service to all employers of labor. The book 
is marred by crudities of expression, such as the use of 
'expressively' for expressly, and the obsolete form 'invalid- 
ity' for invalidism, but is readable, nevertheless, and is 
likely to be widely appreciated. 



Annual Tables of Constants and Numerical Chemi- 
cal, Physical, and Technological. By the International 
Committee of the Seventh Congress of Applied Chemistry. 
Pp. 727. No index. The University of Chicago Press, 
Chicago, 1912. For sale by the Mining and Scientific Press. 
Price $6.5-1 postpaid. 

This ponderous volume, replete with data, is the fruit of 
the efforts of the committee appointed by the Seventh Con- 
gress of Applied Chemistry at London in 1909. It has 
been prepared under the patronage of the International 
Association of Academics, by a group of over thirty of the 
best known physical and applied chemists of Germany, 
France, and England, and is published simultaneously in 
Paris, Leipzig, London, and Chicago. The volume issues 
under the date of 1910, but, on account of the necessary 
labor of preparation, the appearance of the volume has 



been much delayed. For this reason the index has been 
omitted, the omission having been partly supplied by the 
usual French analytical table of contents, which the Amer- 
ican reader commonly does not find to be of much service. 
The amount of care taken in preparing the tables may be 
inferred from the fact that postcards are enclosed with 
each volume so that readers may report at once any error 
that may be detected. The introduction and chapter head- 
ings are given in French, German, English, and Italian, 
but the tables are in French, the language most likely to 
be easily intelligible to the other nationalities, though the 
tables might have been improved by departing from Conti- 
nental usage, such, for example, as the use of the comma for 
the decimal point. The tables are unusually complete, cov- 
erinu' all the most important physical and chemical constants 
of the elements and their compounds and alloys. The vol- 
ume is bulky, and it might be wise in succeeding issues 
to divide it into several parts. An illumination engineer 
would be grateful for the tables on radiation and reflect- 
ing power, but would care nothing about colloids and vapor 
pressures. Considering its size, the book is very cheap; 
a valuable feature, since it is scarcely worth while to pre- 
pare tables and publish them in so expensive a form that 
few will feel able to afford them. The volume will be a 
welcome one to chemists and physicists, and is likely to 
quickly create a place for itself. 

Dksign of Mill Structures. By Milo S. Ketchum. Pp. 
459. Ill, index. McGraw-Hill Book Co., New York, 1912. 
For sale by the Mining and Scientific Press. Price $4. 

This is a new book in a field never previously covered in 
any satisfactory manner. The author is a professor in the 
University of Colorado, and an experienced writer as well 
as engineer. While the book is supplementary to his 'De- 
sign of Steel Mill Buildings' and 'Design of Walls, Bins, 
and Grain Elevators,' it is self-contained, and is compre- 
hensive. 

The general description of the various 'Hoisting Arrange- 
ments and Methods,' up to page 21, with examples from 
actual existing works, is clearly and ably given and covers 
the subject in a very instructive manner. The subject of 
'Hoisting Ropes,' to page 28, details of 'Cages and Skips,' 
to page 40, are also fully described, and clearly shown in the 
illustrations. The 'Stresses of Head-frames and Structures,' 
from page 41 to page 91, are explained and demonstrated 
thoroughly. The subject is treated in every detail, and is 
such as will enable the designing engineer to follow the 
formula} in making standard calculations. The descriptions 
of the various head-frames, to page 147, are clear and ex- 
plicit. The illustrations are complete and amply cover the 
many types used in good practice. 'Coal Tipples,' to page 
197, also are clearly illustrated and described, and the ones 
chosen form a good typical collection. 

The chapter on design of roof trusses, to page 240, while 
being a reprint from some of Mr. Ketchum's other works, 
is valuable and makes the chapter on 'Graphics and Calcu- 
lations' clear and complete in itself. The design of bins 
and retaining walls, to page 278, is concise, interesting, and 
complete, explaining the necessary calculations fully. The 
discussion of 'Coal Washers,' to page 290, is good, fully 
described, and contains typical illustrations, as is also 
true of 'Coal Breakers,' to page 305. 'Miscellaneous Struc- 
tures,' to page 316, covers construction used in mine struc- 
tures. 

Many of the tables in the chapter on 'Design, Costs, and 
Tables,' to page 371, are new and useful, and the part on 
'Specifications' covers the subject fully and is excellent ref- 
erence in making specifications for any detailed require- 
ment. The various subjects described and illustrated are 
all based on good practical working plants, and make them 
particularly valuable reference. The compilation is the 
best that I have seen ; in fact, I do not know of any other 
book that supplies such information, and treats the subject 
of mine structures — especially of head-frames — in one 
volume. The author should be highly commended for pro- 
ducing so useful a book. T. C. 



34 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



Recent Publications 



The Prevention of the Pollution of Canadian Sur- 
face Waters. By T. Aircl Murray. 24 pp. Ottawa, 1912. 

Map 14A, Province of Nova Scotia, Kings County. 
(Hall Harbour sheet, No. 99.) Canada Department of 
Mines, 1910. 

The Preservation of Mine Timbers. By E. W. Peters. 
Forest Service. Bull. 107. 27 pp. ; ill., maps, index. Wash- 
ington, May 1912. 

Map 13A, Province of Nova Scotia. Hants and Kings 
Counties. (Kingsport sheet, No. 84.) Canada Depart- 
ment of Mines, 1911. 

Mineralogical Notes. Series 2. By Waldemar T. Schal- 
ler. U. S. Geol. Sun-. Bull. 509. *115 pp.; ill., tables, 
index. Washington, 1912. 

The Birds of the Rosebud Indian Reservation, South 
Dakota. By Albert B. Regan. From The Auk, Vol. XXV, 
No. 4. 6 pp. Washington. 1908. 

Unproductive Black Soils. Purdue University Agricul- 
tural Experiment Station. Bull. No. 157, Vol. XVI. 39 
pp.; ill., tables. Lafayette, May 1912. 

Commercial Fertilizers. Purdue University Agricul- 
tural Experiment Station. Bull. No. 156. Vol. XVI. .97 
pp.; tables, map. Lafayette. April 1912. 

Production of Chromic Iron Ore in 1911. By W. C. 
Phalen. Advance chapter from 'Mineral Resources of the 
U. S., 1911.' 10 pp. Washington, 1912. 

The Progress of the Mineral Industry of Tasmania 
for the Quarter Ending March 31, 1912. By W. H. 
Wallace. 13 pp.; tables. Tasmania, 1912. 

Liming the Soil. By John B. Abbott. Purdue Uni- 
versity Agricultural Experiment Station. Circular No. 33. 
16 pp.; ill., map. Lafayette, February 1912. 

The Gabbros and Associated Rocks at Preston, Con- 
necticut. By G. F. Loughlin. 158 pp.; ill., maps, index. 
U. S. Geol. Sun-. Bull. 492. Washington, 1912. 

Memoir of Samuel Franklin Emmons. By Arnold 
Hague. Reprinted from the Bulletin of the Geological Soci- 
ety of America, Vol. 23. Pp. 12-28. March 14, 1912. 

Geology and Mineral Resources of the Peoria Quad- 
rangle. Illinois. By J. A. Udden. U. S. Geol. Surv. 
Bull. 506. 103 pp.; ill., maps, index. Washington, 1912. 

Report of the Department of Sanitation of the Isth- 
mian Canal Commission for the Month of March, 1912. 
By W. C. Gorgas. 50 pp.; tables, index. Washington, 
1912. 

Tin Resources of Alaska. By Frank L. Hess. Advance 
chapter from Bulletin 520, 'Mineral Resources of Alaska, 
1911.' U. S. Geol. Sun. Bull. 520-B. 6 pp. Washington. 
1912. 

Speech of Hon. John D. Works of California in the 
Senate of the United States to Establish an Independ- 
ent Health Service. 78 pp. Washington, April 29 and 
30, 1912. 

Gas Analysis as an Aid in Fighting Mine Fires. By 
George A. Burrell and Frank M. Seibert. Bureau of Mines. 
Technical Paper 13. 16 pp.; ill., tables, index. Washing- 
ton, 1912. 

The Gypsum Industry in 1911. By Ernest F. Burch- 
ard. Advance chapter from 'Mineral Resources of the 
U. S.. 1911.' U. S. Geol. Surv. 8 pp.; tables. Washing- 
ton, 1912. 

Annual Report of the Mineral Production of Can- 
ada During the Calendar Year 1910. By John McLeish. 
Canada Department of Mines. 328 pp.; tables, index. Ot- 
tawa, 1912. 

Annual Report of the Directors of American Tele- 
phone & Telegraph Co. to the Stockholders for the 
Year Ending December 31, 1911. 51 pp.; ill., maps. New- 
York, 1912. 



The Mineral Pigments of Pennsylvania. By Benja- 
min L. Miller. Topographic and Geologic Survey of Penn- 
sylvania. Report No. 4. 101 pp.; ill., maps, index. Har- 
risburg, 1911. 

The Minerals of Tonopah, Nevada. By Arthur S. 
Eakle. 22 pp.; ill., index. University of California Publi- 
cations. Bull, of the Department of Geology. Berkeley, 
May 17, 1912. 

Report of the State Geologist on the Iron Ores of 
Marshall and Benton Counties Made to the Geolog- 
ical Commission. Mississippi State Geol. Surv. 23 pp. 
Jackson, 1912. 

The Production of Abrasive Materials in 1911. By 
W. C. Phalen. Advance chapter from 'Mineral Resources 
of the U. S., 1911.' U. S. Geol. Surv. 22 pp.; tables. 
Washington, 1912. 

The Production of Phosphate Rock in 1911. By F. 
B. Van Horn. Advance chapter from 'Mineral Resources 
of the U. S., 1911.' U. S. Geol. Sun. 14 pp.; tables. 
Washington, 1912. 

The Effects of Cold Weather upon Train Resistance 
and Tonnage Rating. By Edward C. Schmidt and F. W. 
Marquis. University of Illinois Bulletin No. 59. 25 pp.; 
ill. Urbana, 1912. " 

Results of Co-operative Fertilizer Tests on Clay 
and Loam Soils. Purdue University Agricultural Experi- 
ment Station. Bull. No. 155, Voy. XVI. 34 pp. ; ill., tables. 
Lafayette, April 1912. 

Protest Against Further Diversion of Water from 
Lake Michigan for the Chicago Drainage Canal. Pre- 
sented at Washington by Commission of Consenation of 
Canada. 27 pp.; maps. 

The Production of Fuller's Earth in 1911. By Jef- 
ferson Middleton. Advance chapter from 'Mineral Re- 
sources of the U. S., 1911.' U. S. Geol. Sun. 7 pp.; 
tables. Washington, 1912. 

Quantity and Quality of Creosote Found in Two 
Treated Piles After Long Service. By E. Bateman. 
Forest Sen-ice. Circular 199. 8 pp.; ill., tables, index. 
Washington, May 22, 1912. 

Deterioration and Spontaneous Heating of Coal in 
Storage. A preliminary report by Horace C. Porter and 
F. K. Ovitz. Bureau of Mines. Technical Paper 16. 14 
pp.; index. Washington, 1912. 

Coal on Dan River, North Carolina. By R. W. Stone. 
Advance chapter from Bull. 471, 'Contributions to Economic 
Geology, 1910. Part II.' U. S. Geol. Surv. Bull. 471 -B. 
35 pp. : map, index. Washington, 1912. 

The Geology of the Dun Mountain Subdivision, Nel- 
son. By James Mackintosh Bell. Edward de Courcy Clarke, 
and Patrick Marshall. Department of Mines. Bull. No. 12. 
71 pp.; ill., maps, index. Wellington, 1911. 

Statistics of the Pottery Industry in the United 
States in 1911. By Jefferson Middleton. Advance chap- 
ter from 'Mineral Resources of the U. S., 1911.' U. S. 
Geol. Surv. 11 pp.; tables. Washington. 1912. 

An Investigation of the Coals of Canada with Ref- 
erence to Their Economic Qualities. Vol. II. By J. 
B. Porter and R. J. Durley. Canada Department of Mines. 
194 pp.; ill., tables, maps, index. Ottawa, 1912. 

Geologic Investigations along the Canada-Alaska 
Boundary. By A. G. Maddren. Advance chapter from 
Bulletin 520, 'Mineral Resources of Alaska, 1911.' U. S. 
Geol. Surv. Bull. 520-K. 20 pp. Washington, 1912. 

Alunite in the San Cristobal Quadrangle, Colorado. 
By Esper S. Larsen. Advance chapter from Bull. 530, 
'Contributions to Economic Geology, 1911. Part I.' U. S. 
Geol. Sun. Bull. 530-F. 7 pp. Washington. 1912. 

Lignite in the Fort Bf.rthold Indian Reservation, 
North Dakota, North of Missouri River. By Max A. 
Pishel. Advance chapter from Bulletin 471, 'Contributions 
to Economic Geology, 1910. Part II.' U. S. Geol. Sun. 
Bull. 471-C. 19 pp.; maps, plates. Washington, 1912. 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



35 



Conce ntrates 

Most of these are in reply to questions received by mail. 
Our readers are invited to ask questions and give informa- 
tion dealing with the practice of mining, milling, and smelting. 



'T'UBE-MILLS were first used for the fine grinding of 
ore in 1894 at the Moulton mill, at Butte, according 
to R. F. Abbe. 



OH00K is a term applied to the staves and head of a 
^ barrel when knocked down and bound together for 
shipment. Material for boxes, when packed the same way, 
is also termed shooks. 



T ITHIUM salts give to the non-luminous flame a car- 
mine red color, which is visible as violet through a blue 
glass, but is obscured by a green glass, giving a distinc- 
tion from potassium. LiCl is soluble in absolute or amyl 
alcohol, while sodium and potassium chlorides are almost 
insoluble. 



QUICKSILVER lost in milling at the Ready Bullion 
mill of the Alaska United amounted to 35.5% of the 
total used. Practically all this was lost in the mill, the 
loss during retorting being less than 2% of the total. 
The loss per ton milled was approximately 1/15 oz., or 
a little over 1 oz. quicksilver per ounce of free gold re- 
covered. 



Q.RAPHITE imported into the United States nearly all 
comes from the island of Ceylon, and the United States 
has for many years been the principal market for this 
Ceylon product. Considerable amounts of graphite are 
also imported into the United States from Mexico, and 
within the last few, years graphite from Korea has en- 
tered the market. 



A MBLYGONITE was extensively mined in 1907 and 
1908 at the Peerless mine, near Keystone, North Da- 
kota, by Herman Reinhold, of the Western Chemical Re- 
duction Co. of Omaha, Nebraska. The mass of amblygon- 
ite was about 20 ft. wide, was pearly white, and had one 
good cleavage plane. It has been worked to only a slight 
depth, but has produced several hundred tons of ore. 



T OINTS in air-transmission lines must be carefully made 
so as to prevent leaks and to eliminate friction as far 
as possible; allowance must be made for expansion and 
contraction, especially if the pipe is carried above ground; 
pockets in the line without means of emptying the segre- 
gated moisture must be avoided, and finally, provision 
must be made for repairs to the pipe-line should these 
be necessary. 

TLJOLMES method of riffle tables and launders employs 
a wide steel tray placed directly under the screen, slop- 
ing in the same direction, and fitted either with or with- 
out riffles. This steel tray, which catches the screenings, 
empties on to another trap sloping in the opposite direc- 
tion, which in turn delivers the material on to a set of 
divided sluices fitted with riffles and sloping toward the 
stern. 



OTEPS by which the miner develops or constructs his 
title or ownership to a lode or placer claim, are by 
initiating a possessory right by making a discovery, com- 
pleting it by acts of location and record, maintaining it 
from year to year by annual labor; and perfecting it to the 
fee-simple or absolute title after placing $500 worth of 
improvements upon it, by obtaining patent for it from the 
General Land Office at Washington, through entry and 
purchase at the local land office. 



'T' AILING and dumps which have been abandoned are 
subject to re-location if upon unoccupied public land, 
but if the land is in private ownership such material be- 



longs to the owner of the surface rights and is not open 
to location. Tailing from a mill which is in operation, 
if it escapes upon the land of other persons or upon 
public land, ceases to be the property of the mill-owner. 
Where the land belongs to another, he may claim dam- 
ages and later exact a royalty for the privilege of re- 
working the tailing. If the tailing escapes upon public 
land it is open to location as a placer deposit. 



DELTS should not be replaced on pulleys while they 
are running at high speed if long service is desired. 
Belts should not be used too tight, nor should the lace- 
holes be punched too close together, or too near the end. 
Two large a punch should not be used. It is cheaper to 
break the lacing than tear the belt, and there is no great 
objection to allowing the lacing to fold in the holes. Belt- 
ing should not be allowed to run against the splice, and 
animal or mineral oil should not be used in dressing rubber 
belting; boiled linseed oil is best. Idlers should not be 
used unless absolutely necessary, as a belt running free 
lasts longer. A long belt should be heavier than the 
horse-power indicates, otherwise it will whip. A heavy 
belt requires a larger pulley to give the best service. 



"MTTRATES, solid and in solution, may be detected by 
the use of a reagent made by treating 5 gm. zinc amal- 
gam with a mixture of 5 c.c. HC1 (1.18) and 5 c.c. of 
1% solution of strychnia sulphate. Boil, cool, and de- 
cant. Of the reagent, 0.5 c.c. is added to 10 c.c. of the 
water to be tested. Nitrites, if present, give a red col- 
oration at once and can be colorimetrically estimated. If 
5 c.c. of H,S0 4 is added, a coloration due to nitrates 
appears, which can be estimated in the same manner. If 
it is desired to estimate nitrates direct, add to 10 c.c. of 
the water 2 drops of NH 4 OH, and 3 or 4 drops of acetic, 
and evaporate to dryness to eliminate nitrites. A repe- 
tition of this treatment may be desirable to effect complete 
removal. Finally, take up with 10 c.c. of water and test 
for nitrites as above. 



A LLOYS of steel have been extensively investigated by 
railroads and rolling-mill operators, in order to pro- 
duce a rail that will give more satisfactory service than 
the ordinary rail now in use. One of the principal metals 
used in these experiments, according to the U. S. Geological 
Survey, is titanium. More than 250,000 long tons of rails 
were rolled in 1910 from steel to which ferro-titanium 
had been added. More than 150,000 tons of steel rails in 
which nickel or nickel and chromium were used as alloy 
were also made during 1910, and experiments were made 
with about 80,000 tons of steel rails in which chromium, 
manganese, vanadium, and other metals were used. Cer- 
tain steelmakers are now advertising titanium steel, claim- 
ing that although no titanium is left in the steel, the 
removal of gases and impurities effected by it greatly in- 
creases the good quality of the steel. 



CHROMIUM is mainly used in pigments and in con- 
nection with special tanning processes. It is also 
used in furnace linings, to a small extent in steel alloys, 
and in the manufacture of other alloys, among which is 
one known as 'chromax bronze.' Though the domestic 
production of chromic iron ore in 1911 was small, the 
importations were large, amounting to 37,540 tons, valued 
at $407,958. In addition chromic acid and bichromate of 
potash were imported to the value of $3508. Chromic 
iron ore is widely distributed through areas of serpentine 
and associated basic rocks in different parts of the United 
States. Such areas have been found in a few localities 
in the old metamorphic rocks east of the Appalachian re- 
gion from New England to Georgia; at various points in 
the Rocky Mountain region; throughout the extent of 
the Sierra Nevada and Coast Ranges in California, and 
at a few points in the Cascade mountains. It is widely 
disseminated through many of these areas, but only locally 
is it concentrated into workable deposits. 



36 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



Catalogues Received 

Allis-Chalmers Co., Milwaukee, Wisconsin. Bulletin 
No. 1626, 'Hydraulic Turbines.' 8 pages. Illustrated. 8 
by 10 inches. 

Senn-Smith Concentrator Co., Hearst Bdg.. San Fran- 
cisco. Bulletin No. 1, 'Pan Motion Concentrator.' 6 pages. 
Illustrated. 8V2 by 6 inches. 

The Lunkenheimer Co., Cincinnati, Ohio. '1912 Cata- 
logue and Price List of Engineering Specialties.' 654 
pages. Illustrated. 5*4 by 7 1 /i inches. 

Carnegie Steel Co., Pittsburg, Pennsylvania. Pamphlet 
'Structural Beams.' Information and data on new line 
of I-beam sections. 12 pages. Illustrated. 5 by 8 inches. 

The Hatward Co., 50 Church street, New York. Pam- 
phlet No. 5S8, 'Hayward Buckets and Digging Machinery.' 
8 pages. Illustrated. 6 by 9 inches. 

Link-Belt Company, Chicago. Book No. 121, 'Ewart 
Friction Clutch.' 18 pages. Illustrated. 6 by 9 inches. 
Also booklet. 'Link-Belt Locomotive Cranes.' 32 pages. 
Illustrated. 9 by 6 inches. 

The Bristol Co., Waterbury, Connecticut. Catalogue 
No. 1000, 'Bristol Recording Gauges for Pressure and Vac- 
uum.' 64 pages. Illustrated. IOV2 by 8 inches. Also, 
Bulletin No. 132, 'Bristol's Recording Ammeters,' 4S pages. 
Bulletin No. 144, 'Bristol's Round Form Recording Pics- 
sure Gauges,' model 52, 4 pages. Bulletin No. 148, 'Bris- 
tol's Round Form Recording Pressure Gauges,' models 50 
and 56, 8 pages. Bulletin No. 166, 'Bristol's Patent Auto- 
mobile Time Recorder.' 4 pages. All illustrated. WV 2 by 
8 inches. 

Merrill Metallurgical Co.. 143 Second St., San Fran- 
cisco. Covering the Merrill Zinc Dust Precipitation Proc- 
ess, the Merrill Automatic Sluicing Pressure Slime Filter, 
and the Merrill Sluicing Clarifying Filter. Illustrated. 7 1 2 
by 11 inches. This series of catalogs is an excellent exam- 
ple of the high-class technical material that is now in- 
cluded in manufacturers' catalogs. Together the pamphlets 
constitute practically a manual on zinc-dust precipitation 
and filter-press treatment of sand and slime. Detailed fig- 
ures of operating costs are given with exact data as to 
quantities and time. Included in the pamphlets are reprints 
of several excellent technical articles. The material is at- 
tractively printed, well illustrated, and the text is sound as 
well as excellently presented. No engineer interested in 
cyanidation can afford not to have a copy. 

A most artistic and complete catalogue of mechanical 
rubber goods has recently been issued by The Diamond 
Rubber Co., Akron, Ohio. It consists of 160 pages. Each 
page is a tint-block with a halftone of the article de- 
scribed at the top and the product in actual service shown 
at the bottom. Reading matter is attractively arranged 
around and between the halftones. The color combination 
is brown and red on a black tint. Tt is divided into sec- 
tions on 'Transmission Belt,' 'Conveyor Belt,' 'Hose.' 'Pack- 
ing.' 'Moulded Goods,' 'Mats and Matting,' and 'Hard Rub- 
ber.' Also, an additional section is devoted to Diamond 
tires and other Diamond products. Valuable information 
covering data on belting, hose, packing, etc., is scattered 
plentifully throughout the entire hook. A clever scheme 
is carried out in the end-sheets, which are a series of the 
Diamond trade-marks with the characteristic word 'Dia- 
mond' diagonally across the double-page spread. The cover 
is artistic. The design illustrates the wide range of in- 
dustries that use Diamond products. 



Commercial Paragraphs 



J. D. Hull. Seattle. Washington, lias recently accepted 
the agency of the Edgar Allen American Manganese Steel 
Co. His territory is to be the western half of the state 
of Washington. 

Allan W. Marks, formerly with De La Vergne Refrig- 
erating Co.. is now associated with H. \V. Johns-Manville 



Co. as refrigerating engineer, with headquarters at the 
San Francisco office. Mr. Marks has had extensive experi- 
ence in installing refrigerating plants for marine and 
other service. 



Switch-Boards for Small Mining Plants 



The equipment necessary for the control and distribu- 
tion of electrical energy for small mining plants is simple, 
comparatively inexpensive, and in general, similar to that 
used in street railway systems using direct-current gen- 
erators for power. Since one side of the system is 
grounded, the switching, protecting, and measuring appar- 
atus is reduced to a minimum, it being necessary to take 
care of the generator and feeder circuits of a single polarity 
only. However, to obtain safe and satisfactory service, 
there are a few features which, if not absolutely essential, 
are at least advisable. The equipment should be of sturdy 
construction and good workmanship, and the panel sup- 
ports should be insulated from ground to lessen the chance 
of short circuits. The circuit-breakers in the generator 
circuits should be connected between the negative brushes 
and the series field to protect the machines from grounds. 




either internal or between the machine and the panel. The 
switching equipment should be such that when machines are 
run in multiple, the series field of the incoming machine may 
be connected in multiple with those of the running ma- 
chines and the voltage adjusted before closing the main 
switches, as this arrangement insures the correct polarity 
of the incoming machine and the least disturbance in 
paralleling. 

Often, too, in small mining plants, a separate source of 
power is not always available for operating the station and 
switchboard lamps. This may he taken care of by a light- 
ing switch and fuses on each generator panel, using lamps 
of the same voltage as the generators or of lower voltage 
and connecting them in series. The lighting circuits should 
be connected between the circuit -breaker and the machine 
ami not to the bus-bar, so that the station can be lighted 
from any machine before the power is thrown on the line, 
and also to prevent the station from being thrown in dark- 
ness should the breakers on all machines open. These 
points have been taken care of in a new line of 250/275 
and 550 575-v. small mining plant switch-boards lately 
turned out by the General Electric Co. These switch-boards 
can he ordered direct from descriptive Bulletin No. 4877, 
containing illustrations, specifications, wiring diagrams, and 
all other necessary information. 



MINING AND SCIENTIFIC PRESS 



5 



THE PARRAL TANK SYSTEM 
OF SLIME AGITATION 

(PATENTED) 

The Most Efficient and Economical System. Operates the Continuous Process in Flat 
Bottom Tanks of any height and any Diameter. In Successful Operation in PARRAL, 
ZACATECAS and GUANAJUATO. Superior Results Guaranteed. 



PACHUCA TANK 



Comparison Table of 
Corresponding Items In Standard Parral and Pachuca Tanks. 



POINTS OF COMPARISON 


PARRAL 


PACHUCA 




15 


45 




25 


15 


Horizontal Area in Square feet 


490.8 


176.7 




14 


39 




7671.2 


6891.3 


Holding Capacity in Metric Tons of Solids, 








92.8 


83.3 


1J " 1 


139.4 


125.3 


1 " 1 


155.3 


139.5 


Weight of steel plate and all construction 








14,650 


33,000 


Pounds Steel per Ton of 2.1 Pulp 


157 


400 


Pounds Air Pressure required for Agitation 


8 to 10 


30 to 50 




FOR FULL PARTICULARS ADDRESS: 

BERNARD MacDONALD, Apartado 33, Guanajuato, Mexico 

Until Peace in Mexico, Address: 

Sierra Madre Club, Los Angeles, Cal. 



6 



MINING AND SCIENTIFIC PRESS 



PROFESSIONAL DIRECTORY 

Arranged Geographically. For Addresses See Cards on Following Pages. 

ENGINEERS, METALLURGISTS AND GEOLOGISTS 

See Pages 8-10-12-14-16-18-20-22. 

RATES: One-half inch $25 per year (48 cents per week). Combination rate with THE MINING MAGAZINE of London. 
% inch in each, $40 per year (77 cents per week). Subscription included. 



UNITED STATES. 



ALASKA. 

Bristol. J. J. 
LIdstone, E. D. 
Poison. W. L. 
Robe, Lucien S. 



ARIZONA. 

Blauvelt. Harrington. 
Collins. Edgar A. 
Defty, W. E. 
Kemp. William. 
Miller. Bernard P. 
Muter & Teale. 
Plckard. Bvron O. 
Smith & Ziesemer. 
Sultan & Wayne. 
Tolman. Cyrus Fisher, Jr. 



CALIFORNIA. 

Additon, A. Sydney. 
Aldridge. Walter H. 
Arnold. Ralph. 
Bain. H. Foster. 
Baird, Dudley. 
Beatson, A. K. 
Bradley. Fred W. 
Brandes. Juan Felix. 
Bretherton. S. E. 
Burch. Caetani & 

Hershey. 
Burch, H. Kenyon. 
Carpenter. Alvln B. 
Clark, Baylies C. 
Clark. C. C. 
Clevenger. O. Howell. 
Cox & Juessen. 
Cranston. Robert E. 
Dennis, Clifford G. 
Derby, Chas. C. 
Edsall. Burroughs. 
Forstner. William. 
Fowler. Edward J. 
Freeborn, F. M. 
Haggott. Ernest A. 
Hall. Leon M. 
Harvey. F. H. 
Hoffmann. Ross B. 
Hohl, L. J. 
Hunt, Bertram. 
Hunt & Co.. Robt. W. 
Innes, Murray. 
Janes. Byron E. 
Janin. Charles. 
Jewell, William R. 
Johnson, Harry R. 
Juessen Edmund. 
Kerr, Mark B. 
Kline, R. C. 
Lanagan, W. H. 
Leggett & Hellmann. 
McDermott, Mitchell & 

McDermott. 
McLaughlin, R. P. 
Merrill, Charles W. 
Merrill, Frederick J. H. 
Morris, F. L. 
Mudd, Seeley W. 
Munro, C. H. 
Myers, Desaix B. 
Nelll, James W. 
Newman & Beals. 
Noyes, William S. 
Osmont, Vance C. 
Parrish, S. F. 
Pollak Co., The A. J. 
Prlchard, W. A. 
Probert, Frank H. 
Radford, William H. 
Rainsford, R. S. 
Read, Thomas T. 
Ross, G. McM. 
Ross, John, Jr. 
Scott. Robert. 
Simonds, Ernest H. 
Sizer, F. L. 
Smith, Howard D. 
Stebbins, Elwyn W. 
Storms, William H. 



Turner, H. W. 
Whitwell. C. B. 
Wlckes, L. Webster. 
Wiley, W. H. 
Wiseman, Philip. 
Wolf, J. H. G. 



COLORADO. 

Allen & Colburn. 
Argall & Sons, Phillip. 
Carpenter's Sons, F. R. 
Chase, Charles A. 
Collins, George E. 
Davis, Wm. H. 
Dickerman, Alton L. 
Dorr, John V. N. 
Fairchild, O. H. 
Farish, John B. 
Finch, John Wellington. 
Goudy. Frank B. 
Hills & Willis. 
Holland, L. F. S. 
Lowe, Henry P. 
Moore, Charles J. 
Reid, Walter L. 
Revett, Ben Stanley. 
Rickard, Forbes. 
Staver, W. H. 
Thomas, Chas. S., Jr. 
Toll, Rensselaer H. 
Van Wagenen, Theo. F. 
Warwick. A. W. 



DISTRICT OP 
COLUMBIA 

Veatch, A. C. 



IDAHO. 

Anderson & Son, G. 

Scott. 
Burley & Myers. 
Easton, Stanly A. 
Edwards, R. L. 
Livingston & Stewart. 
Nichols, Ralph. 



ILLINOIS. 

Hollis, H. L. 

Hunt & Co., Robert W. 

Osgood, Carter & Co. 



KENTUCKY. 

Fohs, F. Julius. 



LOUISIANA. 

Stanford, Richard B. 



MASSACHUSETTS. 

Eveland, A. J. 
Lindsley & Livermore. 
Richards, Robert H. 
Rogers, Allen Hastings. 
Sears, Stanley C. 
Wenstrom, Olof. 



MICHIGAN. 

York, Grant & Co. 



MINNESOTA. 

Collins, Edwin James. 
Longyear Company, E. J. 
Winchell. Horace V. 



MISSOURI. 

Kirby, Edmund B. 
Malcolmson, Jas. W. 
Nicholson, Frank. 



MONTANA. 

Creden, William L. 
Fisher, Wm. B. 
Greene, Fred T. 
Kuphal, Henry E. 



NEVADA. 

Abbott, James W. 
Adamson, W. G. 
Additon. A. Sydney. 
Brown Eng. Co., Walter 
M. 

Cutler, H. C. 
Ferguson, Donald. 
Haft & Colwell Bros. 
Lakenan, C. B. 
McColloms Co., The. 
Reid, John T. 
Symmes, Whitman. 
Wilkinson.. C. D. 



NEW MEXICO. 

Clifford, James O. 



NEW YORK. 

Armstead, Henry Howell. 
Ball, Sydney H. 
Beatty, A. Chester. 
Benedict, Wm. de L. 
Brodie. Walter M. 
Channing, J. Parke. 
Clements, J. Morgan. 
Cox. W. Rowland. 
Doveton, Godfrey D. 
Dufourcq, Edward L. 
Dwight, Arthur S. 
Farish, John B. 
Fearn, Percy L. 
Finch, John Wellington. 
Finlay, J. R. 
Garrey, George H. 
Hunt & Co., Robert W. 
Lefevre, Henry F. 
Leggett & Hellman. 
Lindberg, Carl O. 
Lloyd, R. L. 
Mercer, John W. 
Minard, Frederick H. 
Mines Management Co. 
Olcott & Corning. 
Pearse, Kingston & 

Browne. 
Perry, O. B. 
Poillon & Poirier. 
Pomeroy, Wm. A. 
Raymond, Rossiter W. 
Ricketts & Banks. 
Riordan, D. M. 
Rogers, Alexander P. 
Rogers, Allen Hastings. 
Rogers, Edwin M. 
Semple, Clarence C. 
Sharpless. Fred'k F. 
Simonds & Burns. 
Spilsbury, E. Gybbon. 
Sussman, Otto. 
Townsend, Arthur R. 
Webber, Morton. 
Westervelt, William 

Young. 
Yeatman. Pope. 



OHIO. 

Hutchinson & McCrary. 



OREGON. 

Bacon, W. S. 
Oregon-Idaho Invest- 
ment Co. 



PENNSYLVANIA. 

Chance, H. M. 
Clapp, Frederick G. 



DuBois & Mixer. 
Garrison, F. Lynwood 
Myers, Desaix B. 
Spurr, J. Edward. 



PHILIPPINE ISLANDS. 

Cole, F. L. 

Hanlon. Russell Yale. 
Wilmot. H. C. 



TEXAS. 

Bradley, D. H.. Jr. 
Fishback, Martin. 
Hardy, J. Gordon. 
Oglesby, John S. 
Wright, Louis A. 



AFRICA. 

Ackerman, Audley H. 
Bosqui. F. L. 
Bray, Francis P. 
Broadbridge, W. 
Dixon, Clement. 
Rotherham. G. H. 
Stockfeld, G. A. 



ASIA. 

Beadon, W. R. Coleridge. 
Dickson, A. A. C. 
Drucker, A. E. 
Hubbard, J. D. 
Samwell, N. 
Stines, Norman C. 



AUSTRALIA. 

Bellinger, H. C. 
Grace, William Frank, 
Smith, J. D. Audley. 
Von Bernewitz. M. W. 



CANADA. 

Bailey, Frank. 
Beaudette, A. J. 
Brewer, Wm. M. 
Ferrier, W. F. 
Forbes, D. L. H. 
Fowler, Samuel S. 
Gracey, A. H. 
Hardman, John E. 
Keffer, Frederic. 
Kirby, A. G. 
Lamb, R. B. 
Leckie, J. Edwards. 
Levy, Ernest. 
Loring, Frank C. 
Miles, A. D. 
Nickerson, R. B. 
Williams, Percy. 



CENTRAL AMERICA. 

Hartley, J. H. 



EUROPE. 
Andre Griffiths, Mann- 
helm & Co. 
Bach, William. 
Bayldon, H. C. 
Beatty. A. Chester. 
Blyth. Charles R. H. 
Botsford. Robert S. 
Broadbridge, W. 
Brown, R. Gllman. 
Chaplin, George P. 
Claudet, Arthur C. 
Collins, Henry F. 
Curie, J. H. 

Griffith & Co., Daniel C. 
Hawxhurst, Robert, Jr. 
Henderson, Henderson 

& Higgins. 
Herzig, Charles S. 
Hoffmann, August O. 
Holloway, George T. 
Hommel & Co. 
Hoover, H. C. 



UTAH. 

Austin, L. S. 
Du Bois & Mixer. 
Jennings, E. P. 
Johnson, M. M. 
Krumb, Henry. 
MacDonald, Jesse J. 
McKim, J. W. 
Nelll. James W. 
Winwood, Job H. 



WASHINGTON. 

Clark, V. V. 
Kehoe, Henry. 
Lancaster, Henry M. 
Richardson. S. H. 



Hoover, Theodore J. 

Hutchlns. J. P. 

Johnson & Sons Smelt- 
ing Works, Ltd. 

Knox, Newton Booth. 

Kuehn, A. F. 

Li nek, F. W. 

Loring, E. A. 

Loring. W. J. 

Merricks, Crane & Co 

Mlchell George V 

Mines Management Co. 

Nichols, Horace G. 

Pawle & Brelich. 

Payno & Co.. F. W. 

Pearse. Kingston & 
Browne. 

Perkins. Walter G. 

Prisk. Thomas H. 

Purington. Chester W. 

Queneau. A. L. 

Rickard. Edgar. 

Rickard, T. A. 

Stewart. Charles H. 

Stockfeld, G. A. 

Teale, J. W. 

Thurston, E. C. 

Titcomb, H. A. 

Turner, H. W. 

Weatherbe, D'Arcy. 

Wels, S. J. 

Wright, Charles Will. 



MEXICO. 

Armstead. Henry Howell 
Babb, Percy Andrus. 
Brodie, Walter M. 
Bullock, L. N. B. 
Caldwell. Forest B 
Crookshanks, H. F. M. 
DeKalb, Courtenay. 
Enos, Herbert C. 
Ford. N. O. S. 
Grothe & Carter. 
Helm, J. D. 
Hoyle, Charles. 
McCausland, Ross D. 
Mines Management Co. 
Nahl. Arthur C. 
Oldfleld, Frank W. 
Paul, W. H. 
Raymond, Robert M. 
Royer, Frank W. 
Shaw, S. F. 
Stevens, Blarney. 
Tlmmons, Colin. 
Tweedy, Geo. A. 
Warwick, A. W. 



SOUTH AMERICA. 

Couldrey, Paul S. 
Crease, Herbert H. 
Decoto, L. A. 
T< raser, Lee. 
Jenks, Arthur W. 
Lamb, Mark R. 
Loram, S. H. 
Macnutt. C. H. 
Marsters, V. F. 
Strauss, Lester W. 
Young, James S. 



FOREIGN 



MINING AND SCIENTIFIC PRESS 



7 



THE WEDGE MECHANICAL FURNACE 

PATENTED 



CAST=IRON SHAFTS ELIMINATED 
BY MODERN PATENTED DESIGN 

Years ago when we first began building furnaces for pri- 
vate use, we used cast-iron shafts, with the arms bolted to 
the shaft. We tried various designs, and our experience was 
probably similar to what yours has been if you have used 
large furnaces having cast-iron shafts. 

It is necessary to cool a cast-iron shaft, which was done 
in our early designs, with air, and later with water. This 
type, having the arms bolted to shaft, necessitates shutting 
down the furnace to replace an arm. These interruptions 
are expensive. Further, as everyone knows, cast-iron about 
a furnace, exposed to the heat and gases, is sooner or later 
eaten out. Further, the replacing of a cast iron shaft or 
sections of same, is an undesirable expenditure of money 
and labor. 

To do away with all these difficulties, the same type of 
construction was adopted in the shaft as is used in the walls 
of the furnace. The shaft is protected by the brick, the 
same as the outer shell is protected by brick walls. 

Further, an arm can be changed in a hot furnace in less 
than an hour's time. This all means economy in operation. 

Write us, stating analysis of ore, concentrates, mixture 
or material you desire to roast, characteristics and physical 
condition of same, number of tons to be treated per twenty- 
four hours, and results you desire in the calcine. 

WEDGE MECHANICAL FURNACE COMPANY 

GREENWICH POINT, PHILADELPHIA 



MINING AND SCIENTIFIC PRESS 



PROFESSIONAL DIRECTORY 



ABBOTT, James W., 

Mining; Engineer. 

Pioche, Nevada. 



ACKERMAN, Audley H., 

Mining: Engineer. 

Bulawayo. Rhodesia, South Africa. 
Cable: Consulting. Usual Codes. 



ADAMSON, W. G., 

Consulting: Mining: Engineer 
and Metallurgist. 

P. O. Box 69. Winnemueea, Nevada. 



ADDITON, A. Sydney, 

Metallurgical Engineer. 

Cyanide Mill and Plant Construction. 
318 Market St., San Francisco, 
And Rhyolite, Nev. 



ALDRIDGE, Walter H. : 

Mining and Metallurgical Engineer. 

603 Central Building, 
Los Angeles, Cal. 



ALLEN & COLBURN, 

Engineers. 

Mining, Hydraulics, 
Milling, Irrigation. 
Ideal Bdg., Denver. 



ANDERSON & SON, G. Scott, 

Consulting Mining Engineers. 

Wallace, Idaho. 
Coeur d'Alene Mines. 
Code: Bedford McNeill. 



ANDRE GRIFFITHS, 

MANNHEIM & CO., 

Mining Engineers. 

Salisbury House, London. Cable: Nodule. 



ARGALL & SONS, Philip, 

Mining and Metallurgical Engineers. 

First National Bank Bdg., Denver. 
Cable: Argall. Code: Bedford McNeill. 



ARMSTEAD, Henry Howell, 

Consulting Engineer. 

29 Broadway, New York. 
Apartado 65, Guanajuato, Mexico. 



ARNOLD, Ralph, 

Consulting Geologist and Engineer. 

Oil Properties a Specialty. 
921 Union Oil Bdg.. Los Angeles, Cal. 
Cable: Arniol. Code: Bedford McNeill. 



AUSTIN, L. S., 

Mining and Metallurgical Engineer. 

Dooly Block, Salt Lake City, Utah. 
Examinations and reports on mining 
properties. Cor!-: I-:, -dfm-il MeNeil l. 



BABB, Percy Andrus, 

Mining and Metallurgical Engineer. 

Ediricio La Cia. Bancaria, Mexico, D. F. 

Avenida 5 De Mayo No. 32. 
Cable: Prosmine. Code: Hedford McNeill. 



BACH, William. 

Placer Engineer. 

Glyngarth, Beechwood Rd., 
Sanderstead, Surrey, England. 
' '"']■■: M.-.Will, 190S. 



BACON, W. S., 

Mining Engineer and Metallurgist. 

Kerby, Josephine County, Oregon. 



BAILEY, Frank, 

Mining Engineer. 

Box 23, Merritt, British Columbia. 



BAIN. H. Foster, 

Mining Geologist. 

Editor Mining and Scientific Press. 
No professional work undertaken. 



BAIRD, Dudley, 

Metallurgist and Engineer. 

Specialty: Copper. 
Care Pacific Foundry Co., San Francisco, 
''.■it'll-: Simlturgy. Code: Western Union. 



BALL, Sydney H., 

Mining Geologist. 

71 Broadway, New York. 
Cable: Sydball. Code: Bedford McNeill. 



BAYLDON, H. C, 

Mining Engineer. 

Kotchkar. Orenburg Gov., 
Russia. 



BEADON, W. R. Coleridge, 

Mining Engineer. 

Post Box 231, Rangoon, Burma, India. 
Cable: Mentor, Rangoon. 

Code: A. B. C. 5th Ed. 



BEATSON, A. K., 

Mining Eugineer. 

Formerly manager Big Bend, Cal. 
Later at Latouche, Alaska. 
220 Central Bank Bdg.. Oakland. Cal. 



BEATTY, A. Chester, 

Consulting Mining Engineer. 

71 Broadway, New York. 
No. 1 London Wall Bdgs., London, E. C. 
Cable: Granitic. Code: Bedford McNeill. 



BEAUDETTE, A. J., 

Mining Engineer. 

Grand Trunk Pacific Railway, 
Winnepeg, Canada. 
Cable: Bearr. Code: A. B. C. 



BELLINGER, H. C, 

Metallurgical Engineer. 

General Manager 
Great Cobar Limited, 
Cobar. N. S. W. 



BENEDICT, William de L., 

Mining Engineer. 

19 Cedar St., New York. 



BLAUVELT, Harrington, 

Mining Engineer aud Metallurgist. 

Prescott, Arizona. 
Mines examined and reported upon. 



BLYTH, Charles R. H., 

Mining Engineer. 

Care Cox & Co., London, Eng. 



BOSQUI, F. L., 

Metallurgical Engineer. 

Care of H. Eckstein & Co., 
Johannesburg, Transvaal. 
Cable: Franho. Usual Codes. 



BOTSFORD, Robert S., 

Mining Engineer. 

36, Leinster Square, 
Bayswater, London, W. 



BRADLEY, D. H., Jr., 

Mechanical Engineer. 

Specialty: Mining & Milling Machinery. 
Exam. & Equipment of Mexican Proper- 
ties. 1 700 Rampart St.. El Paso. Texas. 



BRADLEY, Fred W.. 

Mining Engineer. 

Crocker Building, San Francisco. 
Cable: Basalt. Code: Bedford McNeill. 



BRANDES, Juan Felix, 

Consulting Mining Engineer. 

Newhall Bdg., San Francisco. 
Cable: Brandes. Code: McNeill. 



BRAY, Francis P., Mining 

' Engineer. 

Care The West African Trust, Ltd., 
Bogosu, via Tarquah, Gold Coast. Africa. 

Cable: Francisco, Tarquah. 

Patricius. London. 



BRETHERTON, S. E., 

Consulting Mining Engineer. 

26 yrs. exp. metallurgist and mine mgr. 

Mills Bdg., San Francisco. 
Cable: Bretherton. Code: Bed. McNeill 



BREWER, Wm. M., 

Mining Engineer and Geologist. 

P. O. Box 701. Victoria, B. C. 
Cable: Brewer. Code: Bedford McNeill. 



BRISTOL, J. J., 

Mining Engineer. 

Nome, Alaska. 



BROADBRIDGE, W., 

Mining Engineer. 

62 London Wall, London, E. C. 
Tarkwa. Gold Coast Colony. 
Cable: Rillstope. Usual Codes. 



BRODIE, Walter M., 

Mining Engineer and Metallurgist. 

Mexican Address: Box 219, Chihuahua. 
New York Address: 45 Broadway. 



BROWN, R. Gilman, e.m., 

Consulting Engineer. 

62, London Wall, London, E. C. 
Cable: Argeby, London. Usual Codes. 



BROWN ENG. CO., Walter M., 

Successors to Brown-Tolman Eng. Co. 
Mining Engineers. 

Searchlight. Las Vegas and Good- 
springs. Nevada. 



BULLOCK, L. N. B., 

Metallurgical Engineer. 

Mexico Mine & Smelter Supply Co., 
Mexico City, Mex. 
Cable: Bullock Usual Codes. 



BURCH, CAETANI & HERSHEY, 

Gelaslo Caetani. 
Albert Burch. Oscar H. Hershey. 

Mining, Metallurgy, and Mining 
Geology. 

Crocker Bdg., San Francisco. 
Cable: Burch, Codes: Bedford McNeill, 
or Caetani. Moreing & Neal. 



BURCH, H. Kenyon, 

W «■<• h a nlen 1 and Metallurgical Engineer. 

Suite 314 Central Building, 
Los Angeles. Cal. 



BURLEY & MYERS, 

Miniim ICnKtneers. 

Patent Surveying, Examinations, and 
Reporting. 
Murray. Idaho. 



CALDWELL, Forest B.. 

Mining Engineer. 

Supt. The Candelaria Land, Mining & 
Power Co., Ltd., San Dimas. Dgo., Mex. 
Cable: Candelaria. Code: Red McNeill 



CARPENTER, Alvin B., 

Mining Engineer.' 

California Bdg., Los Angeles, Cal. 



MINING AND SCIENTIFIC PRESS 



9 



Yuba Gold Dredges 

Yuba Suction Dredges 

Yuba Centrifugal Pumps 




Gold Dredge equipped with 15 cu. ft. buckets operating at Natoma, Oal. Designed and Built by 
The Yuba Construction Co. for the Natomas Consolidated of California. 



Gold Dredges built with steel or wood hulls and equipped with buckets of 1 Vi cubic 
feet to 15 cubic feet capacity each. Always designed to meet 
the conditions under which they are to operate. 

WE DESIGN AND BUILD: 

Small Gold Dredges 

With steel or wood hulls designed and built for properties where 
transportation is difficult. 

Centrifugal Pumps 

Especially adapted for irrigation, mining and hydraulic dredging. 

SUCTION, DIPPER AND ELEVATOR DREDGES 

and other excavating machinery. 

GENERAL MACHINE SHOP WORK, CARBON, MANGANESE AND OTHER 

ALLOY- STEEL CASTINGS 

The Yuba Construction Co. 

311 California Street San Francisco, California, U.S.A. 

Seattle, Wash. : Alaska Bldg. Works : Marysville, California. 

• Representatives for the Bucyrus Co. in the West and Orient. 
Western representatives of the Taylor Iron and Steel Co. for manganese used on dredges. 



PROFESSIONAL 

DIRECTORY (Continued) 



MINING AND SCIENTIFIC PRESS 



CARPENTER'S SONS, Franklin R. 

Arthur Howe Carpenter, 
Cranxton Howe Carpenter, 
Maleolm Howe Carpenter. 

fahletCarpenter. Rguitable Brig. Denver. 



COLLINS. Henry F., 

Mining Engineer, 

Huelva Copper & Sulphur Co., Ltd., 
Valdelamusa. Prov. de Huelva. Spain. 
Cable: Huflvacop. Code: Broomhall. 



DICKERMAN, Alton L., 

Consulting Mining Engineer. 

Colorado Springs, Colorado. 
Cable: Dlckerman. 



CHANCE, H. M., Coal. 

Consulting Mining Engineer. 

837 Drexel Bdg., Philadelphia. 



COULDREY, Paul S„ 

Mining Engineer. 

Gen. Supt. Cerro de Pasco Mining Co., 
Cerro de Pasco, Peru, S. A. 
Cable: Cf-rroeop, 



DICKSON, Archibald A. C, 

Mining Engineer. 

Kodarma. E. I. Ry., India. 
Cable: Dickson. Nawada. Usual Codes. 



CHANNING, J. Parke, 

Connultlng Engineer. 

42 Broadway, New York. 



COX, W. Rowland, and Staff, 

Consulting Specialists. 

Management, Operation, and Examina- 
tion of Mines and Mills. 
16"> Broadway, New York. 



DIXON, Clement, 

Mining Engineer. 

P. O. Box 305. Bulawayo. Rhodesia. 



Cable: Clement Dixon. 



Usual Codes. 



CHAPLIN, George P., 



Mining Engineer. 

49 A8hburnham Mansions, Chelsea, 
London. S. W. 



COX & JUESSEN, 



Thomas Cox. Edmund Juessen. 

Mining and Metallurgical Engineers. 

906 Mechanics' Indt. Bdg., 
San Francisco. 



DORR, John V. N., 

Metallurgical Engineer. 

Specialty: Cyanidatlon. 
733-734 First Nat l Bank Bdg., Denver. 
Cable: Dorr. Code: Bed. McN.. West. Un. 



CHASE, Charles A. 



Mining Engineer. 

734 First Nat. Bank Bdg., Denver. 
Liberty Bell G. M. Co., Telluride, Colo. 



CRANSTON, Robert E., 

Mining Engineer. 

First National Bank Building, 
San Francisco. 
Cable: Recrans. Usual Codes. 



DOVETON, Godfrey D., 

(With W. Rowland Cox.) 
Metallurgical Engineer. 

Specialist in Milling, Testing, Designing. 
165 Broadway. New York. 



CLAPP, Frederick G., gkoio«st 

Associated Geological Engineers. 

Reports on Oil, Gas, and Mineral 
Properties. 
331 Fourth Ave.. Pittsburg. Pa. 



CREASE, Herbert H., 



Mining Engineer. 

Santana. Honda, Rep. Colombia, 
South America. 



DRUCKER, A. E., 



Consulting Metallurgist 

To the Oriental Con. Mining Co., 
Taracol. Korea. 
Cable: Pukchln. Code: A. B. C. and A-1. 



CLARK, Baylies C, 

Mining and Mechanical Engineer. 

Lightner Mine, 
Angels Camp, Calaveras County, 
California. 



CREDEN, William L., 

Consulting Mining Engineer. 

Mine Examination and Management. 
407-9 Phoenix Building, 
Butte. Montana. 



Dubois & mixer, Engine"™ 

H. W. DuBois, C. T. Mixer, 

Philadelphia. Pa. Salt Lake City. Utah. 

302 Harrison Bdg., Philadelphia. 
Cable: Mixerdubog. Code: McNeill 



CLARK & CLARK, 

Consulting Mining Engineers. 

C. C. Clark. V. V. Clark. 

1003% Broadway, 444 Henry Bdg., 
Oakland. Cal. Seattle. Wash. 



CROOKSHANKS, H. F. M., 

Mining Engineer and Cyanide Expert. 

la Capuchlnas No. 9, 
Mexico, D. F. 



DUFOURCQ, Edward L., 

Mining Engineer. 

Room C 22-23-24 Produce Exch. Annex. 

New York. 
Cable: Dufourco,. Code: McNeill 



CLAUDET, Arthur C, 



6 Coleman Street, 
Cable: Assaying. 



London. 

Usual Codes. 



CURLE. J. H., 

Mine Valuer. 

62 London Wall, London. 



DWIGHT, Arthur S., 

Mining Engineer and Metallurgist. 

25 Broad St., New York. 
Cable: Sinterer. 

Codes: Bed. McNeill: Miners & Smelters. 



CLEMENTS, J. Morgan. 



Mining Engineer and Geologist. 

20 Broad St.. New York. 

Code: Bedford McNeill. 



CUTLER, H. C, e m., 

Mining Engineer. 

29 Colonial. Reno, Nevada. 

Code: Bedford McNeill. 



EASTON, Stanly A., 

Mining Engineer. 

Manager Bunker Hill & Sullivan Mining 

& Concentrating Company, 
Kellogg, Idaho. 



CLEVENGER, G. Howell, 

Metallurgical Engineer. 

381 Hawthorne Ave., Palo Alto, Cal. 

Code: Bedford McNeill. 



DAVIS, Wm. H., 

Consulting Metallurgical Engineer. 

Examinations and Reports. Mills De- 
signed and Erected. Boulder, Colorado. 



EDSALL, Burroughs, 



Mining Engineer. 

Benton, Mono County, Cal. 



CLIFFORD, James 0., 

Mining and Consulting Engineer. 

Deming, New Mexico. 
Especially conversant with the S.W. and 
Mexico. Codes: Bed. Mc-N.. West Union. 



DECOTO, L. A., k m , 

Supt. I'niu Mines (Colombia), Ltd. 

Address, Barranquilla, Colombia, 
Care Dugand e Hljo. 
Cable: D°coto, Zaragoza. Code:Bed. McN. 



EDWARDS, R. L., 



Mining Engineer. 

Salmon, Idaho. 



COLE, F. L, 

Mining Engineer. 

9 Plaza Cervantes. 
Manila, P. I. 
Cable: Hanco. 



DEFTY, W. E., 

Mining Engineer. 

Phoenix. Arizona. 
Cable: Wed. Codes: Lleber, McNeill. 



ENOS, Herbert C, 

Mining Engineer. 

56 Quirk Bdg., Mexico, D. F. 
Apartado 1583. 

Code: Bedford McNeill. 



COLLINS, Edgar A., 

Mining Engineer. 

Commonwealth Mine, 
Pearce, Arizona. 



DE KALB, Courtenay, 

General Manager Pacific Smelting & 
Mining Co. 
Apartado 172, Guaymas, Sonora. Mexico. 



EVELAND. A. J., 



Mining Engineer. 

Consulting Engineer for Hornblower & 

Weeks, Bankers. 
60 Congress St.. Boston. Mass. 



COLLINS, Edwin James, 

Mining Engineer. 

Mine Examinations and Management. 
1008-1009 Torrey Bdg., Duluth. Minn. 



DENNIS, Clifford G., 

Mining Engineer. 

Crocker Bdg., San Francisco. 
Cable: Terllngueite. Code: Bed. McNeill. 



FAIRCHILD, 0. H., 

Consulting, Mining and 
Metallurgical Engineer. 

Exam's, Reports, Mills Designed, Erected 
428 Railway Exchange Bdg.. Denver. 



COLLINS, George E., 

Mining Engineer. 

Mine Examinations and Management. 
420 Boston Bdg., Denver. 
Cable: Colcomac. 



DERBY, C. C, WHITWELL, C. B. 

Consulting Mining Engineers, 
Assuyers. and Chemists. 

Nevada City, California. 

Code: Bedford McNeill. 



FARISH, John B., 

Mining Engineer. 

25 Broad St., New York. 
603 Colorado Bdg., Denver. 
Cable: Farlsh. 



MINING AND SCIENTIFIC PRESS 



11 



World Beaters ! ! 

The following list of " Moveable " or Type A, Moore Filter Process 
Plants, treating in the aggregate several thousands of tons of Gold and 
Silver slimed ores DAILY in the Pachuca District, Mexico, have as the 
result of their high efficiency, put a q-u-i-e-t-u-s on the making of 
further installations of the "Stationary" or Type B, in that region. 

Negociacion Minera de San Rafael y Anexas. 

Compania Beneficiadora de Metales "La Union, S. A." 

Oompania Minera de Natividad y Anexas, S. A. 

Compania Purisima Grande, Guadalupe y Anexas. 

Compania de Minas La Blanca y Anexas, S. A. 

Negociacion Minera de Santa Gertrudis y Guadalupe, S. A. 

Compania Beneficiadora de Metales, Haciendas de San Francisco, 

Pachuca, S. A. 
Senor Gabriel Mancera. 
Rincon y Anexas, S. A. 
Compania Beneficiadora de Pozos, S. A. 
Compania Minera El Barreno y Anexas. 

Our Engineering Staff, which is at your service, is of a very high 
order — as it should be, when the question recovering the last "trace" 
of Gold and Silver values once reduced or put into solution, is in- 
volved. 

Coupling the Clancy Electrochemical Process with the Moore, 
the combination for high extraction, minimized loss of Cyanide, com- 
plete "displacement" (recovery) is perfect. 

We are guaranteeing one of the companies in Mexico having at 
present an installation of the "Stationary" Filter (not of our design- 
ing, however) an economy of $100,000 per annum, by adopting our 
Moore-Clancy Process, which will include changing over to the "Move- 
able" Type of working the Process; so you see, we are still quite in 
the "running." 

The Moore Filter Company 

NEW YORK, U. S. A. 

NOTICE.— For branch offices and agencies see issue of this journal of April 20, 1912. 



PROFESSIONAL 

DIRECTORY (Ooniinued) 



MINING AND SCIENTIFIC PRESS 



FEARN, Percy L., 

Mining Engineer. 

36 Wall St., New York. 



FERGUSON, Donald, 

Consulting Mining Engineer. 

Cable: Ferg. Box 644. Goldfleld, Nev. 

Codes: Moreing & Neal: Bedford McNeill. 



J-EKKlER, W. F., 

Mining Engineer and Geologist. 

204 Lumsden Bdg., Toronto, Ont. 
General Manager, Natural Resources 
Exploration Co.. Ltd. 



FINCH, John Wellington, 

Geologist and Engineer of Mines. 

71 Broadway. New York. 
730 Symes Bdg., Denver. 



FINLAY. J. R., 

Mining Engineer. 

Room 802, 52 William St.. 
New York. 



FISHBACK, Martin, 

Mining Engineer. 

Guaranty Trust Bdg.. El Paso, Texas 
Cable: Fishback. Code: Western Union. 



FISHER, Wm. B., 

Mining Knglneer. 

Butte. Montana. 



FOHS, F. Julius, 

Mining Oeologlnt and Engineer. 

Lexington. Ky. 



FORBES, D. L. H., 

Mining and Metallurgleal Engineer. 

306 Manning Chambers, Toronto, Ont. 
Examinations, Reports. Consultation, 
Design of Mine and Mill Equipment. 



FORD, N. 0. S., m.s., e.m., 

Consulting Mining Engineer. 

Apartado 130, Oaxaca, Mexico. 

Code: Moreing & Neal. 



FORSTNER, William, 

Mining Engineer. 

1120 Stanyan St.. San Francisco. 
Cable: Forstner. Code: Bedford McNeill. 



FOWLER, Edw. J., 

Metallurgist and Engineer. 

Specialty: Copper. 
Care Pacific Foundry Co.. San Francisco. 
Cable: Smeltnrgy. 



FOWLER, Samuel S„ 

Mining Engineer and Metallurgist. 

Nelson, British Columbia. 
Cable: Fowler. Usual Codes. 



FRASER, Lee, 

Mining Engineer. 

Apt. 168 Oruro, Bolivia. 



FREEBORN, F. M., 

Metallurgist. 

Cyaniding Problems. Mills Designed. 
120 North Valencia Street, 
Alhamhra. Cal. 



GARREY, George H., 

Mining Geologist and Engineer. 

165 Broadway, New York. 



GARRISON, F. Lynwood, 

Mining Engineer. 

766 Drexel Bdg., Philadelphia. 
Cable: Arum. Code: Bedford McNeill. 



GOUDY, Frank B., 

Mining Engineer. 

Agent, Iowa Gold M. & M. Co., 
Aniinas Forks Con. M. & M. Co., 
Silverton. Colo. 



GRACE, William Frank, 

Mining Engineer. 

Gen. Mgr., Waihi Grand Junction, 
Waihi, N. Z. 
Cable: Gracefully. Usual Codes. 



GRACEY, A. H, 

Mining Engineer. 

Specialty: Free Gold Mining and Milling. 
Nelson, B. C. 



GREENE, Fred T., 

Mining Engineer and Geologist. 

401-2-3 State Savings Bank Bdg., 
Butte, Montana. 



GRIFFITH & CO., Daniel C, 

Assnyers, Metallurgists and .Samplers. 

8, Victoria Avanue, Bishopsgate, 
London, E. C. 
Cable: GryfTydd. Usual Codes. 



GROTHE & CARTER, bZ2S£S£ 

Patented Systems of Pneumatic Agita- 
tion and Slimes Filtration. Ore Tests. 

2a San Agustin 53, P. O. Box 2554. 
Mexico. D. F. 



HAFF & COLWELL BROS., 

Mining Engineers. 

U. S. Mineral Surveyors. 
Compilers of district and county maps. 
Ely. Nevada. 



HAGGOTT, Ernest A., 

Mining Engineer. 

2525 West 18th Street. 
Los Angeles. Cal. 



HALL, Leon M., 

Consulting Engineer 

In Mechanics, Electricity & Mining. 
Room 1120 Kohl Bdg., San Francisco. 
Cable: Leonhall. Code: Western Union. 



HANLON, Russell Yale, 

Mining Engineer. 

Manila. P. I. 
Cable: Hanlon. Code: Bedford McNeill. 



HARDMAN, John E., 

Consulting Mining Engineer. 

112 St. James St., Montreal, Canada. 
Cable: Hardman. Code: Bedford McNeill. 



HARDY, J. Gordon, 

Consulting Mining Engineer. 

Special Mexican Experience. 
Mills Bdg., El Paso, Texas. 
Code: Bedford McNeill. 



HARTLEY, J. H, 

Mining Engineer. 

Abangarez Gold Fields de Costa Rica, 

Costa Rica. Mina Guacimal. 
Cable: Hartln. Code: Bpdfnrd McNeill. 



HARVEY, F. H, 

Mining and Consulting Engineer. 

Gait. California. 



HAWXHURST, Robert. Jr., 

Mining Engineer. 

Care International Banking Corporation, 

36. Bishopsgate, London, E.C. 
Cable: Hawkloff. London Usual Codes 



HELM, J. D., 

Mining Engineer. 

Apartado 1277, Mexico, D. F. 



HENDERSON, HENDERSON & 

HIGGINS, Mining Engineers. 

4, Bishopsgate St., London, E.C. 
Cable: Veinstone. Usual Codes. 



HERZIG, Charles S., 

Engineer of Mines. 

412-419 Salisbury House. 
London, E.C. 



HILLS & WILLIS, 

Victor G. Hills. Frank G. Willis. 

Mining Engineers. 

Cripple Creek. 318 McPhee Bdg., Denver. 
Cable: Hillwlll. Usual Codes. 



HOFFMANN, August 0., 

Mining Engineer. 

Mgr. Polefskoy Copper M. & R. Works. 

Ekaterinburg, Russia. 
Cable: Olovo. Code: McNeill. 1908 Ed. 



HOFFMANN, Ross B„ 

Mining Engineer. 

319 First Nat. Bank Bdg., Oakland, Cal. 

Cable: Rosshof. 



HOHL, L. J., 

Consulting Engineer. 

612 Marvin Bdg.. 24 California St., 
San Francisco. 
Cahle: Hohl. Code: Bedford McNeill 



HOLLAND, L. F. S, 

Mining Engineer and Metallurgist. 

Superintendent of Mines. 
Smuggler-Union Mining Co.. 
Smuggler. Colo. 



HOLLIS, H. L., 

Consulting Mining Engineer 
and Metallurgist. 

1417 First National Bank Bdg.. Chicago. 



HOLLOWAY. George T., 

(Removed from Chancery Lane.) 
Offices, Laboratories and Testing Wks., 
9-13 Emmett St., Llmehouse, London, E. 
Cable: Neolithic. Code: Bedford McNeill. 



HOMMEL & CO., 

Mining and Metallurgleal Engineers. 

6 Broad Street Place. London, E. C. 
Cable: Durommel. Usual Codes. 



HOOVER, H. O, 

Mining Engineer. 

1 London Wall Bdgs., London, E. C. 
No professional work entertained. 

Cable: Revooh. London. 



HOOVER, Theodore J., 

Consulting Mining Engineer. 

Specialty: Flotation Concentr. Process. 

1 London Wall Bdgs., London, E. C. 
Cable:Mlldnloo. 



HOYLE, Charles, 

Mining Engineer. 

Apartado 8, El Oro. Mexico. 



HUBBARD, J. D., 

Melallurglral Engineer. 

Metallurgist for the Chosen Mining Co., 
Yeng Byen, Korea. 



HUNT, Bertram, 

Consulting Chemist and Metallurgist. 

709 Mills Bdg., San Francisco. 



MINING AND SCIENTIFIC PRESS 



13 




This Record of Tunnel Driving 
Will Interest You 

STEWART MINING CO. 

Kellogg, Idaho, Nov. 24, 1911 

TO WHOM IT MAY CONCERN: 

This is to certify that the Stewart Mining Company have driven a 
6x7 foot tunnel (in the clear) 117 feet in seven days, working three 
8-hour shifts with the following crew per shift: one machine man, 
one car man and two muckers, running the dirt 1300 feet. 

This drilling was done with a C-110 "Butterfly" Rock Drill. 

(Signed) WM. A. BEAUDRY, Supt. 

Are You Doing As Well, With Your Drills? 



new york INGERSOLL-RAND CO.™™ 

Offices in All Principal Cities of the World. 
Compressors Rock Drills Core Drills Stoping Drills Electric-Air Drills 



DIRECTORY (Continued) 



MINING AND SCIENTIFIC PRESS 



HUNT & CO., Robert W., 

Engineers. 

Bureau of Inspection, Tests & Consultation. 
Chicago-San Francisco-New York-Pittsburg. 
San Francisco Office. 420 Washington St. 
St. Louis-Montreal-London. 
Consulting, Designing and Supervising En- 
gineers, Inspectors of Railroad. Structural 
and other Materials and Equipment. 
Chemical and Physical Laboratories. 



KIRBY, A. G. ( 

Metallurgist. 

Mill Designing and Construction. 
Specialty: Concentration & Cyanidation. 
Manager Nova Scotia Mine. Cobalt. Ont. 



KIRBY, Edmund B., 

Mining Engineer nnd Metallurgist. 

701 Security Bdg.. St. Louis. 
Specialty: The expert examination of 
mines and metallurgical 1 enterprises. 



LINCK, F. W., 

Mining Engineer. 

Roydene, The Drive, 
Sidcup, Kent, England. 
Cable: Linck. Code: Bedford McNeill. 



LINDBERG, Carl 0., 



(With W. Rowland Cox.) 
Mining Engineer. 

Mines Examined and Reported Upon. 
165 Broadway. New York. 



HUTCHINS, J. P., Mining Engineer. 

Examinations in Russia and Siberia. 

20. Galernaya, St. Petersburg. 
341, Salisbury House, London, E. C. 
Cable: Oetohins. Code: McN.(2 ed.) : W.U. 



KLINE, R. C„ 

Specialist in Gold and Silver Milling 
and Treatment. 

La Jolla Park, San Diego, Cal. 



LINDSLEY & LIVERMORE, 

Halsted Lindsley. Robert Livermore. 
Mining Engineers. 

60 State Street, Boston. 
Cable: Linliv. Code: Bedford McNeill. 



HUTCHINSON & McCRARY, 

F. M. Hutchinson. E. W. McCrary. 
Geologists and Topographers. 

712-714-716 German Bank Bdg., 
Marietta. Ohio. 



KNOX, Newton Booth, 

Mining Engineer. 

Finsbury House, Blomfield Street, 
London, E. C. 
Cable: Knewtonox. 



D. C. Livingston. C. A. Stewart. 

LIVINGSTON & STEWART, 

Mining Engineers and Geologists. 

Examinations, Reports, Surveys, Maps. 
Moscow. Idaho. 



INNES, Murray, 

Consulting Mining Engineer. 

220 Kohl Bdg.. San Francisco. 



KRUMB, Henry, 

Mining Engineer. 

Felt Bdg., Salt Lake City. Utah. 



LLOYD, R. L.. 

Metallurgist. 

25 Broad St.. New York. 



JANES, Byron E., 

Mining Engineer. 

Box 474, Nevada City. Cal. 



JANIN, Charles, 

Mining Engineer. 

620 Kohl Bdg., San Francisco. 
Cable: Charjan. Code: Bedford McNeill. 



KUEHN, A. F., 

Consulting Mining Engineer. 

1, London Wall Buildings, 
London, E. C. 

Cable: Norlte. 



KUPHAL, Henry E., 

Mining Engineer. 

Box 535, Missoula. Montana. 



LONGYEAR COMPANY, E. J., 

Diamond Drill Contractors. 
Manufacturers of Diamond Drills 
and Supplies. 
Exploring Engineers and Geologists. 

General Office: 
710-722 Security Bank Bdg., 
Minneapolis, Minn. 
Cable: Code: 
Longco. Minneapolis. Bedford McNeill. 



JENKS, Arthur W.. 

Resident Manager 
The Tamatina Development Corp, Ltd. 
Chllecito. Provincia de Riojo, 
Argentine Republic. 



LAKENAN, C. B., 

Mining Engineer. 

Ely, Nevada. 



LORAM, S. H., 

Mining and Metallurgical Engineer. 

Care Messrs. Glbbs & Co., 
Valparaiso, Chile, S. A. 
<~\ahle: Loram. Usual Codes. 



JENNINGS, E. P., 

Mining Engineer. 

Salt Lake City. Utah. 
Cable: Chalcocite, Salt Lake. 
Code: Bedford McNeill. 



LAMB, Mark R., 

Mining Engineer. 

Mgr. Allls-Chalmers Co., 
Santiago, Chile. 



Bewick, Moreing & Co. 

LORING, E. A., 

Mining Engineer. 

62 London Wall. London, E.C. 
Cable: Rlnglo. Usual Codes. 



JEWELL, William R , 

Mining Geologist — Oil Reports. 

Formerly Mineral Expert Dept. Interior. 

317 Brower Bdg., Bakersfleld. Cal. 
Cable: Jewell. Code: Bedford McNeill. 



LAMB, R. B., 




Mining Engineer and 


Metallurgist. 


Traders Bank 


Bdg., 


Toronto. Ontario, 


Canada. 



LORING, Frank C, 

Mining Engineer. 

Home Life Building, Toronto, Ontario. 



JOHNSON, M. M., 

Mining Engineer. 

1008 Newhouse Building, 
Salt Lake City, Utah. 



LANAGAN, W. H., 

Mining Engineer. 

1057 Monadnock Bdg.. San Francisco. 

Code: Bedford McNeill. 



LORING, W. J., 

Mining Engineer. 

62, London Wall, London, E. C. 
Cable: Wantoness. Usual Codes. 



JOHNSON & SONS worksT'ltd. 

Bullion Refiners and Metallurgists. 

27-33 Paul St.. Finsbury, London, E. C. 
Cable: Cauterism. 



LANCASTER, Henry M., 

Mining Engineer. 

715-716 Hutton Building, 
Spokane. Wash. 



LOWE, Henry P., 

Consulting and Mining Engineer. 

Central City, Colorado. 



JOHNSON, Harry R., 

Consulting Geologist. 

Petroleum, Water Supply. 
831 H. W. Hellman Bdg., Los Angeles. 
Cable: Jopet. Usual Codes. 



LECKIE, J. Edwards, 

Mining and Consulting Engineer. 

P. O. Box 355. Cobalt, Ontario. 



MacDONALD, Jesse J., 

Mining and Metallurgical Engineer. 

Care Utah Copper Co., 
Garfield. Utah. 



KEFFER, Frederic, 

Consulting Engineer and Geologist. 

With the British Columbia Copper Co., 
Ltd., Greenwood. B. C. 



LEFEVRE, Henry F., 

Mining Engineer. 

71 Broadway, New York. 
Cable: Quique. Code: Bedford McNeill. 



MACNUTT, C. H., 

Mining Engineer. 

General Manager, Poderosa Co., 
Antofagasta. Chile. 
Cable: Macnutt. Code: Bedford McNeill. 



KEHOE, Henry, 

Mining Engineer. 

Mine Examinations, Development, 
Management. 
1123 S. Wall St.. Spokane. Wash. 



LEGGETT & HELLMANN, 

Consulting and Mining Engineers. 

60 Broadway, New York. 
519 California St., San Francisco. 
Cable: Legmann. 



MALCOLMSON, Jas. W., 

Consulting Engineer. 

1012 Baltimore Avenue, 
Kansas City. Mo. 



KEMP, William, 

Mining Engineer. 

Tucson, Arizona. 



LEVY, Ernest, 

Mining Engineer. 

Representing Alex. Hill & Stewart, 
Rossland. British Columbia. 
Cable: Truculent. Code: Bedford McNeill 



MARSTERS, V. F., 

Consulting Geologist. 

Petroleum fields, Peru, a specialty. 
Apartado 856, Lima, Peru, S. A. 



KERR, Mark B., 

Consulting Engineer. 

626 Mills Bdg., San Francisco, Cal. 



LIDSTONE, E. D., 

Mining and Mechanical Engineer. 

Cordova, Alaska. 
Consulting Engineer Cordova Power Co. 



McCAUSLAND, Ross D., 

Mining Engineer. 

Apartado 299, Chihuahua. Mexico. 



MINING AND SCIENTIFIC PRESS 



15 



Consider their Simplicity — 

Butters Filters 




The ONLY slime filter that oper- 
ates by CAPILLARY ADHESION 
of cake. There is no drying — no 
cracking and no loss of cake in 
transfer. There can be no uneven 
percolation. 

Butters Filters are SIMPLE — no 
lifting and carrying of the leaves 



that can cause vibration — no risk 
of accidents. 

Slime assaying only 55 CENTS 
PER TON is profitably treated by 
the Butters. EVERYTHING is 
gotten out with a Butters — there's 
NO WASTE. 



The Butters Patent Vacuum 
Filter Co., Inc. 

30 Church Street. New York, U.S.A. 908 Metropolis Bank Bldg„ San Francisco. U.S. A. 

54 Broad Street, London. E. C. Gante No. 1. Apartado 1578, Mexico City, Mexico 

AGENTS : Fraser* Chalmers, Ltd., London and Branch Offices. Sandycroft Foundry Co., Ltd., London 
and Chester, England. Fried. Krupp A. G. Grusonwork, Madgeburg, Germany. 



PROFESSIONAL 
DIRECTORY (Continued) 



MINING AND SCIENTIFIC PRESS 



McCOLLOMS CO., THE, 

Assays, surveys, reports, managements, 
contracts; non-resident clients cared for 
in Nevada, California, or near districts. 
P. O. Box 847. Reno. Nevada. 



MUDD, Seeley W., 

Mining Engineer. 

1001-2 Central Bdg., Los Angeles, Cal. 

Code: Bedford McNeill. 



OSGOOD, CARTER & CO., 

Mining Engineer*, Metallurgist*, 
Chemists and AsaaTrn. 

404 First Nat. Bank Bdg.. Chicago, 111. 

Cable; Amite. Codes: W. U.: Bed. McN. 



McDERMOTT, MITCHELL & 

McDERMOTT, Mining Engineers. 

John Mitchell. A. J. McDermott. 

A. M. McDermott, M.S. 
708 Security Bdir.. Los Angeles. Cal. 



MUNRO, C. H., 

Mining Engineer. 

Monadnock Bdg.. San Francisco. 
Cable: Ornum. Code: Bedford McNeill. 



OSMONT, Vance C, 

Mining Engineer 

of Daniels & Osmont, Inc. 
Civil, Hyd. and Mining Engineers. 
517-23 Monadnock Bdg.. San Franolsco. 



McKIM, J. W., 

Mining Engineer. 

632 Dooly Block. Salt Lake, Utah. 



MUTER & TEALE, 

Mining Engineers and Assnyers. 

Office and Laboratory, Luthy Block. 
Kingman, Arizona. 



PARRISH, S. F., 

Mining Engineer. 

1400 Union Trust Building, 
Los Angeles, Cal. 



Mclaughlin, r. p., 

Consulting Geologist and Engineer, 

Oil and Metal Mining. 
818 Mills Bdg.. San Francisco. 
' lil' - : 1 'v laugh. 



MYERS, Desaix B., 

Mining Engineer. 

321 Story Bdg., Los Angeles, Cal. 
Philadelphia Address: 1521 Spruce St. 



PAUL, W. H, 

Mining Engineer. 

General Manager Dolores Mines Co. 
Madera, Chihuahua, Mexico. 



MERCER, John W., 

Mining Engineer. 

Gen. Mgr. South American Mines Co. 
Mills Bdg., Broad St.. New York. 



NAHL, Arthur C, 

Mining Engineer. 

Triunfo. Baja California, Mexico. 



PAWLE & BRELICH, K »"iueer». 

(Reginald Pawle, Henry Brellch.) 
Balfour House, Finsbury Pavement, 
London, E. C. 
Cable: Platoons. Code: Bedford McNeill. 



MERRICKS, CRANE & CO., 

Frank Merricks. G. Allen Crane. 
5 & 6 Great Winchester Street, 
London, E. C. 
Cable: Doclrnology. Code: Bed. McNeill. 



NEILL, James W., 

Metallurgist and Mining Engineer. 

159 Pierpont St., Salt Lake, Utah. 
Pasadena, Cal. 



PAYNE & CO., F. W., 

Dredging Engineers. 

62, London Wall, London. E. C. 
Cable: Payndredge. Code: Bed. McNeill. 



MERRILL, Charles W., 

Metallurgist. 

143 Second St., San Francisco. 
Cable: Lurco. Codes: Bedford McNeill 
. and Morcing & Neal. 



NEWMAN & BEALS, 

M. A. Newman. R. L. Beals. 

Mining and Metallurgical Engineers. 

839 Mills Bdg.. San Francisco. 
Code: Bedford McNeill. 



PEARSE, KINGSTON & BROWNE, 

Consulting Mining Engineers. 

Worcester House, Walbrook, London, 
and 35 Wall St., New York. 
Cable: Undermined. Usual Codes. 



MERRILL, Frederick J. H., 

Mining Engineer and Geologist. 

(Late State Geologist of New York.) 
624 Citizens Bank Bdg.. 
Los Angeles. Cal. 



NICHOLS, Horace G„ 

Mining Engineer. 

Downside, Ashtead, Surrey, England. 



PERKINS. Walter G., 

Metallurgical Engineer. 

62, London Wall, 
London, E. C, England. 



MICHELL, Geo. V., 

Mining Engineer. 

Specialty: Placer Mining. 
16-17 Great St. Helens, 
London. E. C. 



NICHOLS, Ralph, 

Connultlng Mining and Metallurgical 
Euglneer. 

Pres. Latest Out M. & S. Co. Ltd. 
Oilmore. L^mhi Co.. Idaho. 



PERRY, O. B., 

Mining Engineer. 

165 Broadway. New York. 



MILES, A. D., 

Mining Engineer. 

R. 801 Traders Bank Bdg., Toronto, Ont. 
Properties examined and investigations 
made with view to purchase or lease. 



NICHOLSON, Frank, 

Consulting Engineer. 

Miners Bank Bdg., Joplin, Mo. 
Cable: Nickhop. Usual Codes. 



PICKARD, Byron 0., 

Engineer of Mines. 

406 Fleming Block, 

Phoenix. Arizona. 



MILLER, Bernard P., 

Mining Engineer. 

Prescott, Arizona. 



NICKERSON, R. 


B., 


Mining Engineer. 


Manager Keno 


ra Mines, Ltd., 


Kenora, 


Ontario. 


fable: P.nystreak. 





POILLON & POIRIER, 

Howard Poillon. C. H. Polrier. 

Mining Engineers. 

25 Broad St.. New York City. 



MINARD, Frederick H., 

Mining Engineer. 

Trinity Bdg., Ill Broadwaj, New York. 
Cable: Frednard, N. Y. Code: McNeill. 



NOYES, William S., 

Mining Kngincrr. 

819 Mills Building, San Francisco. 



POLLAK COMPANY, THE A. J., 

Consulting Petroleum Engineers. 

California Oil Properties. 
Mills Building, San Francisco. 
Cable: Petreng. Usual Codes. 



MINES MANAGEMENT CO., 

Consulting Mining Engineers and 
Mine Managers. 

60 Broadway, New York City. 
Branches: 
London, England. 
28 and 29 St. Swithins Lane. 
Mexico. D. F., 
Avenida 16 de Septiembre, Num. 48. 
Cable: Minmanco. Code: Bed. McNeill. 



OGLESBY, John S., 



Mine Accounting, Audits. Appraisals, 
Valuations. 

Dallas. Texas. 



OLCOTT & CORNING, 

(E. E. Olcott. C. R. Corning.) 
Mining and Metallurgical Engineers. 

36 Wall St., New York. 



POLSON, W. L., 

Mining Engineer and Assayer. 

Examinations and Reports. 
Ketchikan, Alaska. 



POMEROY, Wm. A., 

Mining Engineer. 

55 Wall Street, New York. 



MOORE, Charles J., 

Consulting Mining Engineer. 

741 Equitable Bdg., Denver. 
Telephone: Residence, York 673. 
Cable: Moore. Usual Codes. 



OLDFIELD, Frank W., 

Mining Engineer. 

Mexican Mines Co. 
Bolanos. Jalisco. Mexico. 



PRICHARD, W. A., 

Consulting Mining Engineer. 

Palo Alto, Cal. 



MORRIS, F. L., 

Mining Engineer. 

1057 Monadnock Bdg., San Francisco. 
Cable: Fredmor. Code: Bedford McNeill. 



OREGON-IDAHO INVESTM'T CO 

Mine Examinations, Assaying and 
Ore Purchasing. 
Baker City, Oregon. 



PRISK, Thomas H., 



Mining Engineer, 

St. Agnes, Cornwall. 



MINING AND SCIENTIFIC PRESS 



17 



In Ore Dressing 




the classifying of the particles by means of screens or hydraulic 
classifiers to facilitate the elimination of the gange by concentra- 
tion, is a necessary preparation. 

Screening, or classification by size, is sufficient for the simple 
separation accomplished by jigging. However, concentration of 
fine material on tables and vanners is more complex and screen 
classification is found unsatisfactory. Hydraulic classification 
under free settling conditions is recognized as being more efficient 
in preparing ore for concentration on tables and vanners. 

The development of a hydraulic classifier, operating per- 
fectly, has been the aim of millmen for many years. This result, 
however, was not achieved until the value of the hindered settling 
principle was recognized and adopted by Professor Richards in 
his Hindered Settling Classifier. (This classifier produces a feed 
best prepared for concentration on tables and vanners.) 

We build two types of classifiers involving 
this principle which we can fully recommend 

The Richards Hindered Settling Classifier — the automatic 
type — is successful in the smallest as well as the largest plants. 

The Richards-Janney Classifier — the mechanically operated 
type — is particularly adapted to large tonnage. 



Allis-Chalmers Company 

Mining Machinery Department 
Chicago - Illinois 

OFFICES IN ALL PRINCIPAL CITIES 




PROFESSIONAL 
DIRECTORY (Continued) 



MINING AND SCIENTIFIC PRESS 



PROBERT, Frank H., 

Consulting Engineer and Mining 
Geologist. 

Central Bdg., Los Angeles, Cal. 
Cable: Prohert. Code: McNeill. 



PURINGTON, Chester W., 

Mining Engineer. 

62, London Wall, London, E. C. 
Cable: Olenek. Usual Codes. 



QUENEAU, A. L., 

Melallnrgleal Engineer. 

Zinc Smelting and Electrometallurgy. 

Jemeppe sur Meuse, Belgium. 
Cable: Al.ionak. Usual Codes. 



RADFORD, William H., 

Alluvial Mining. 

2360 Broadway, San Francisco. 
Cable: Bandan. 



RAINSFORD, R. S., 

Mining Engineer. 

Manager Argonaut Mining Co. 
Jackson. Amador County, California. 



RAYMOND, Robert M., 

Mining Engineer. 

The Exploration Co. of England and 
Mexico. Ltd. Mutual Life Bdg. No. 523, 
Mexico. D. F. 



RAYMOND, Rossiter W., 

Mining Engineer and Metallurgist. 

29 W. 39th St.. New York. P. O. Box 223. 



REID, John T., 

Mining and Consulting Engineer. 

Specialty: Copper Mines. 
Lovelock, Nevada. 
Cable: Reid. Code: Bedford McNeill. 



REID, Walter L., 

Supt. Smuggler-Union Cvanide Plant. 
Tests, Design and Construction. 
P. O. Box 471, Telluride. Colo. 



REVETT, Ben Stanley, 

Mining Engineer. 

Alluvial Mining and Installations. 
Breckenridge, Colorado. 



RIORDAN, D. M., 

Consulting Engineer. 

Mining Investigations carefully made 
for responsible intending investors. 
165 Broadway. New York. 



ROBE, Lucien S., 

Dredging and Hydraulics. 

Fairbanks, Alaska. 



ROGERS, Alexander P., 

Mining Engineer. 

25 Broad St., New York. 
Cable: Aprog. Code: Bedford McNeill. 



ROGERS, Allen Hastings, 

Consulting Mining Engineer. 

201 Devonshire St., Boston, Mass. 
71 Broadway, New York, N. Y. 
Cable: Alhasters. 



ROGERS, Edwin M., 

Consulting Mining Engineer. 

32 Broadway. New York. 
Cable: Emrog. Code: Bedford McNeill. 



ROSS, G. McM.. 

Mining and Consulting Engineer. 

Yosemite Club, Stockton, California. 



ROSS, John, Jr., 

Mining and Consulting Engineer. 

Sutter Creek. California. 



ROTHERHAM, G. H. 

Metallurgist. 

City Deep, Ltd., 
P. O. Box 1411, Johannesburg, 
South Africa. 



ROYER, Frank W., 

Mining Engineer. 

Mutual Building, Mexico, D. P., 
Apartado Postal 805. 
Code: Bedford McNeill. 



SAMWELL, N., 

Mining and Metailurgleal Engineer. 

Con. Eng. to the Burma Mining Bureau. 
Cable:Minemet. Box 3S5, Rangoon, Burma 
Codes: McNeill: Lieher: Bro-nhall, 



SIMONDS & BURNS, 

Mining Engineers. 

55 Liberty St., New York. 



SIZER, F. L., 

Consulting Mining Engineer. 

915 First Nat'l Bank Bdg., 
San Francisco. 



SMITH. Howard D., 

Consulting Mining Engineer. 

619 Kohl Bdg., San Francisco. 
Cable: DIorite. Code: Western Union. 



SMITH, J. D. Audley, 

Mining Engineer. 

P. O. Box 1557, 9, Bridge St., 
Sydney, Australia. 
Cahle: Jadiinand. All Codes. 



SMITH & ZIESMER, 

(Franklin W. Smith, Ralph A. Ziesmer.) 
Consulting Mining Engineers. 

Work In Mexico a Specialty. 
Rlshce, Ariz. Code: Bedford McNeill 



SPILSBURY, E. Gybbon, 

Consulting, Mining and Metailurgleal 
Engineer. 

4 5 Broadway. New York. 
Cable: Spilroe. 



SPURR, J. Edward, 

Mining Geologist. 

Bullitt Bdg.. Philadelphia, Pa. 



STANFORD, Richard B., 

kilning Engineer. 

206 Metropolitan Bank Bdg.. 
New Orleans, La. 
Cable: Stanford. Code: Bedford McNeill. 



STAVER, W. H., 

Mining Engineer. 

Box 578, Telluride. Colo. 



STEBBINS, Elwyn W„ 

Mining Engineer. 

819 Mills Bdg., San Francisco. 



RICHARDS, Robert H, 

Ore Dressing. 

Make careful concentrating tests for the 
design of flow sheets for difficult ores. 
491 Boylston St.. Boston. Mass. 



RICHARDSON, S. H„ 

Mining Engineer. 

United States Deputy Mineral Surveyor. 
Republic. Washington. 



SCOTT, Robert, 

Inventor and Hullder of the 
Seott Quicksilver Furnace. 

4 98 S. Eleventh St.. 
San Jose. California. 



SEARS, Stanley C, 

Mining Engineer. 

Postal and Telegraphic Address: 
Room 104 State House. Boston, Mass. 
Code: Bedford McNeill. 



STEVENS, Blarney, 

Engineer and Manager. 

Rincon Mines, Temascaltepec, Mex., 
Mexico. 



STEWART, Charles H., 

Alexander Hill & Stewart. 
4 Broad St. Place, London, E. C. 
Cable: Truculent. Usual Codes. 



RICKARD, Edgar, 

Business Manager 
The Mining Magazine. 
819, Salisbury House, London, E. C. 
Cahle:01igoclase. Code:Redford MeNelll. 



RICKARD, Forbes, 

Mining Engineer. 

Equitable Building, Denver. 



RICKARD, T. A., 

Editor. The Mining Magazine. 
819. Salisbury House, London, E. C. 
No professional work undertaken. 
Cable:Qligoclnse. I 'ode : Bedford McNeill. 



RICKETTS & BANKS, 

Mining Engineers and Metallurgists. 

80 Maiden Lane, New York. 
(See also 'Ore Testing Works.' page 22.) 



SEMPLE, Clarence C, 

Mining Engineer and Metallurgist. 

5 West Sixty-fifth St.. New York. 
Cable: Anthibole. Code: Bedford McNeill. 



SHARPLESS, Fred'k F., 

Consulting Mining Engineer. 

The Con. Mines Sel. Co., Ltd. (London). 

52 Broadway, New York. 
Table: 1'r. siia rp. Code: McNeill. 



SHAW. S. F., 

Mining Engineer* 

Supt. American Smelting & Refining Co. 

Charcas, San Luis Potosi, 
Mexico. 



SIMONDS, Ernest H., 

Metallurgical Engineer. 

1108 Crocker Bdg., San Franclso. 



STINES, Norman C, 

Mining Engineer. 

Box 208, Vladivostok, East Siberia. 
CabIe:Stines Chez Carnation Vladivostok 
Code: Bedford McNeill (Both Kdltlong). 



STOCKFELD, G. A., 

Consulting Engineer, 

The West African Trust, Ltd. 
13, Austin Friars. London, E.C., 
and Tarquah. West Africa. 



STORMS, William H, 

Mining Geologist and Engineer. 

Mining Methods Specialty. 
2457 Hilgard Ave.. Berkeley. Cal. 



STRAUSS, Lester W., 

Engineer of Mines. 

Apartado 1227, Lima, Peru, S. A. 
Cable: Lestra-Lima. Code: Bed. McNeill. 



MINING AND SCIENTIFIC PRESS 



19 




TVTHEN you buy wood split pulleys, you should be sure to get good pulleys; pulleys that will prove to 
be an investment, not an expense. 

Dodge "Independence" are good wood split pulleys. Just as good as selected, seasoned, kiln-dried stock, 
combined with skilled workmanship and twenty-eight years of "knowing how" can make them. 

The proof of any pulley is in the running. Dodge wood split pulleys are balanced, and run true. They 
are backed by the Dodge guaranty. There are over three million "Independence" wood split pulleys in suc- 
cessful operation and the output each year is greater than the year before. 

There are reasons for this. First, the quality and merit of the pulley. The facility with which it can be 
mounted on the shaft. The interchangeable bushings, by means of which it fits all sizes of shafting within 
a wide range. The perfect shaft fastening without keys or setscrews. The superior belt surface. And, 
last, the moderate price as compared with pulleys of any other type. 

Dodge wood split pulleys will run satisfactorily anywhere that regular leather belting can be used. 



DODGE MANUFACTURING CO. 

EVERYTHING FOR THE MECHANICAL AND ECONOMICAL TRANSMISSION OF POWER 

Offices and Works: Mishawaka, Indiana 

BRANCHES AND WAREHOUSES CARRYING COMPLETE STOCKS 



New York 

21 Murray St. 

Cincinnati 

126-128 W est Third St. 



Chicago 

208-214 South Clinton St. 

Boston 

137-139 Purchase St. 



Brooklyn 

37th St. and Second Ave. 

Minneapolis 

202-204 Third Street, South. 



Philadelphia 

816 Arch St. 

Pittsburgh 

337 Second Ave. 



Atlanta 

54-6 Marietta St. 

St. Louis 

607 North Main St. 



fROFESSIONAL 
DIRECTORY (Continued) 



MINING AND SCIENTIFIC PRESS 



SULTAN & WAYNE, 

W. S. Sultan. Howard T. Wayne. 
Mining Engineer*. 

Globe, Arizona. 



SUSSMAN, Otto, 

Mining Engineer. 

52 Broadway, New York. 



SYMMES, Whitman, 

Mining Engineer, 

Supt. United Comstock Pumping Assn. 

Supt. Mexican Mine, etc. 
Virginia City. Nevada. 



Bainbridge, Seymour & Co. 

TEALE. J. W., 

Mining Engineer. 

Salisbury House, London, E.C. 
Cahlp: F:isern. Usual Codes, 



THOMAS, Charles Sewell, Jr., 

Mining Engineer. 

730 Symes Building, Denver. 



THURSTON, E. Coppee, 

Mining Engineer. 

Care of A. Goerz & Co.. 
Pinners Hall, Austin Friars, 
London. E. C. 



TIMMONS, Colin, 

Mining Engineer. 

Tacxo, Guerrero, Mexico. 



TITCOMB, H. A., 

Salisbury House, 
London, E.C. 
Cable: Titcomb. Code: Bedford McNeill 
(two ►■'ill inns i. 



TOLL, Rensselaer H., 

Mining Engineer. 

410 Boston Bdg., Denver. 
Cable: Rentoll. Code: Bedford McNeill. 



TOLMAN. Cyrus Fisher, Jr., 

ConMulting Geologist. 

Territorial Geologist of Arizona. 
Specialist in Arizona, Sonora and New 
Mexico ore deposits. Tucson, Ariz. 



TOWNSEND, Arthur R., 

Mining Engineer. 

Mines examined and reported on. 
25 Broad St., New York. 
N. Y. Cahle: Arttown. Code: Bed. McNeill. 



TURNER, H. W., 

Mining Geologist. 

708 Mills Bdg.. San Francisco. 
62 London Wall, London. 
Cable: I.atlte, Code: Bedford McNeill. 



TWEEDY, Geo. A., 

Mining Engineer. 

General Manager, Minas del Tajo. 
Rosario. Sinaloa, Mexico. 



VAN WAGENEN, Theo. F., 

1221 Sherman St., Denver, Colo. 
Cable: Vanwagenen. 

Code: Bedford McNeill. 



VEATCH, A. C, 

SpeelnllMt In Geology of Oil. 

Cosmos Club, 
Washington, D. C. 
Cable: Yanders. Code: Bedford McNeill. 



VON BERNE WITZ, M. W., 

Metallurgist. 

G. P. O., Kalgoorlie, W. A. 
Cable: Benrewitz. Code: McNeill. 1908.- 



WARWICK, A. W., 

Mining Engineer. 

208 McPhee Building, Denver. 
Choix, Sinaloa, Mexico. 
Code: Bedford McNeill. 



Bainbridge, Seymour & Co. 

WEATHERBE, D'Arcy, 

Mining Engineer. 

352 Salisbury House, London. E.C. 
Cable: Basera. Code: McNeill, both Ed. 



WEBBER, Morton, 

Mine Valuation and Development. 

42 New St.. New York. 
Cable: Orebacks. 



WEIS, S. J., 

Dredging. 

De Keysers Royal Hotel. 
Embankment. London, E.C. 



WENSTROM, Olof . Copper. 

Mining Engineer. 

53 State St., Boston. 
Cable: Olavo. Code: Bedford McNeill. 



WESTERVELT, William Young, 

Consulting Mining Engineer. 

17 Madison Square East, New York. 
Cable: Caiewest. Code: Bedford McNeill. 



WICKES, L. Webster, 

Mining Engineer. 

404-5-6 Grosse Bdg., Los Angeles, Cal. 



WILEY, W. H, 

Mining Engineer. 

367 S. Bonnie Brae St., Los Angeles, Cal. 



WILKINSON, C. D., 

Mining Engineer. 

Care of Geo. Wlngfleld, 
Goldneld, Nevada. 



WILLIAMS, Percy, Mining Engineer 

307 Dominion Trust Bdg., Vancouver. B.C. 
Consulting Engineer for the Canadian- 
American Exploration Co. 
Cable: Caexco. Code: Moreingfe N'eal. 



WILMOT, H. C, 

Alining Engineer. 

Care Colorado Mining Co., 
Aroroy, Masbate, P. I. 



WINCHELL, Horace V., 

Consulting Geologist Amalg. Copper Co., 

505 Palace Bdg., Minneapolis, Minn. 
Cable: Racewln. 



WINWOOD. Job H, 

Mining Engineer. 

Continental Bdg., Salt Lake, Utah. 

Code: Bedford McNeill. 



WISEMAN, Philip, 

Mining Engineer* 

1007 Central Bdg., Los Angeles, Cal. 
Codes: Western Union; Bed. McNeill. 
Cable: Fllwiseman. 



WOLF, J. H. G, 

Manager North American 
Exploration Co. 
1032 Mills Bdg., San Francisco. 



WRIGHT, Charles Will, 

Consulting Engineer and Geologist. 

Formerly of the U. S. Geological Survey. 

Igleslas, Sardinia, Italy. 
Code: Bedford McNeill. 



WRIGHT, Louis A., 

Mining Engineer. 

813 Mills Bdg.. El Paso, Texas. 

Code: Bedford McNeill. 



YEATMAN, Pope, 

Mining Engineer. 

165 Broadway, New York. 
Cable: Ikona. Code: Bedford McNeill. 



YORK, GRANT & COMPANY, 

Mining, Electrical and Civil Engineers. 
Mining Investigations and contracts un- 
dertaken. Special Mexican experience. 
::v - In M.'i ; ra \v IM I '■■tvuit Mich. 



YOUNG, James S., 

Mining and Metallurgleal Engineer. 

Casllla 41. Iquique, Chili: or Casilla 788, 
Lima, Peru. Cable: Perthshire. 
Codes: Lleher: Bed. McNeill (1908). 



Testing for Metallurgical Processes 

By JAMES A. BARR 
216 Pages — Illustrated — Indexed — $2 Postpaid 

'T'HIS BOOK is designed to assist in the selection of the process of treatment for any 
* ore. The author describes the apparatus employed in making laboratory and small-lot 
tests. It is founded upon experimental work at the Michigan College of Mines, and the 
methods recommended have been tested in practice. It is brief and practical, equally val- 
uable to the student and the practicing engineer. 

PUBLISHED AND FOR SALE BY 

MINING AND SCIENTIFIC PRESS, 420 MARKET STREET, SAN FRANCISCO 

THE MINING MAGAZINE, 819, Salisbury House, LONDON, E. C. 




MINING AND SCIENTIFIC PRESS 



21 




Furnished with or 
without back gear 



Designed for the Miner 

The new G-E induction motor specially designed for 
mining service has the following important features: 



High starting effort. 

Large capacity for severe overloads. 

Can be temporarily stalled without injury. 

Unusually strong mechanical construc- 



tion. 



Totally enclosed except for air ducts. 

Ample ventilation given by fan on motor 
shaft. 



End rings have large ventilating surface. 

All parts interchangeable. 

Moisture proof insulation. 

Windings in open slots. 

Extra large bearing surface of rotor spider 

keeps it tight. 

End shields can be removed without dis- 
turbing back shaft. 



Your inquiry when received is assigned to an expert, on the application of electricity 
to mining, who thereafter handles all your correspondence with the result that your 
needs are studied — understood — and delays are avoided. 




eneral f^lectnc (Ijompany 



Largest Electrical Manufacturer in the World 



Principal Office : Schenectady, N. Y. Sales Offices in the following Cities: 



Atlanta, Ga. 
Baltimore, Md. 
Birmingham, Ala. 
Boise, Idaho. 
Boston, Mass. 
Buffalo, N. Y. 
Butte, Mont. 
Charleston, W. Va. 



Charlotte, N. C. 
Chattanooga, Tenn. 
Chicago, 111. 
Cincinnati, Ohio. 
Cleveland, Ohio. 
Columbus, Ohio. 

Denver, Colo. 
Detroit, Mich. (Off. 



Erie, Pa. 
Indianapolis, Tnd. 
Kansas City, Mo. 
Los Angeles, Cal. 
Louisville, Ky. 
Memphis, Tenn. 
Minneapolis, Minn. 
Nashville, Tenn. 
of Sol'g Agt.) 



New Haven, Conn. 
New Orleans, La. 
New York, N. Y. 
Philadelphia. Pa. 
Pittsburg, Pa. 
Portland, Ore. 
Providence, R. I. 
Richmond, Va. 



Rochester, N. Y. 
Salt Lake City. Utah. 
San Francisco, Cal. 
St. Louis, Mo. 
Seattle, Wash. 
Spokane, Wash. 
Springfield, Mass. 
Syracuse, N. Y. 

3331 



JT 



22 



MINING AND SCIENTIFIC PRESS 



ASSAYERS, CHEMISTS AND ORE TESTING WORKS. 





1 

ALASKA. 

Drury, L. M. 

CALIFORNIA. 

Atkins & McRae. 
Baverstock & Staples. 
Falkenau Assaying Co., 
Inc. 

Hanks, Abbot A. 


Herman, John. 
Irving & Co., James. 
George A. James Co., The 
Luckhardt Co., C. A. 
Perez, Richard A. 
Smith. Emery & Co. 

COLORADO. 
Burlingame & Co., E. E. 


Burton, Howard E. 

Richards, J. W. 
Warner, Hayward D. 
Wood & Co., Henry E. 

ILLINOIS. 

Coghill, Will H. 


NEW YORK. 

Ledoux & Co., Inc. 
Ricketts & Banks. 

PENNSYLVANIA. 
Petrological Laboratory. 

TEXAS. 
Critchett & Ferguson. 


UTAH. 

Bardwell, Alonzo F. 
Bird-Cowan Co. 
General Engineering Co. 
The. 

Officer & Co.. R. H. 
Union Assay Office, Inr 



ATKIN & McRAE. 

Assayers, Chemists, and Metallurgists. 
Control and Umpire Assays. 

Careful Analytical Chemists. 
616 South Olive St.. Los Angeles. Cal. 



BARDWELL, Alonzo F., 

(Successor to Bettles & Bardwell.) 
Custom Assayer nnd Chemist. 

158 S. W. Temple St.. Salt Lake, Utah. 
Ore Shippers' Agent. 



BAVERSTOCK & STAPLES, 

Analytical Chemists and Metallurgists. 

223 W. First St., Los Angeles, Cal. 
Technical Examination of Minerals and 
Organic Products. Assaying. 



BIRD-COWAN CO., 

Custom Assnyers and Chemists. 

(Frank A. Bird. Charles S. Cowan.) 
Agents for Ore Shippers. 
160 S. W. Temple St.. Salt Lake. Utah. 



BURLINGAME & CO., E. E., 

Assay Office and Chemical Laboratory. 
Controls, umpires, and engineers work. 
Bullion buyers. Cone, and cyanide tests. 
1 736 Lawrence St., Denver. 



BURTON, Howard E., ^JmUL 

111 E. Fourth St.. Leadville, Colorado. 
Specimen Prices: Gold, 50c; Gold and 
Silver, 75c; Gold, Silver and Lead, $1; 
Gold. Silver nnd Copper. $1.50. 



COGHILL, Will H, 



Consulting Mining Engineer. 
Ore Testing Laboratory. 

Instructor In Mining and Metallurgy, 
Northwestern University. Evanston. III. 



CRITCHETT & FERGUSON, 

Assnyers and Chemists. 

El Paso, Texas. 
Umpire and Controls a Specialty. 



DRURY, L. M. 



Tnnana Assay Office. 

Fairbanks. Alaska. 



FALKENAU ASSAYING CO. Inc. 

Louis Falkenau, Pres. 
School of Assaying, Analytical 
nnd Technological Laboratory. 

918 Washington St., Oakland. Tel. Oakland 8929. 
Umpire assays and supervision of sampling a 
specialty. Instruction given in assaying and 
all branches of Technical Chemistry. Analysis 
of ores, metals, soils and waters, industrial 
products, foods, etc. Court expertlng in all 
branches of chemical technology. Working 
tests of ores and investigation of metallurgical 
and manufacturing processes. Consultation 
on all questions of applied chemistry. 



FROST, Oscar J., 



Assayer. 

511 18th St., Denver. 



HANKS, Abbot A., 

Chemist and Assayer. 

Established 1866. 
630 Sacramento St., San Francisco. 
Control and Umpire Assays. Supervision 

of Sampling at Smelters. 
Cable: Hanx. Code: W. U. and Bed. McN. 



GENERAL ENGINEERING CO., THE, 



CONSULTING ENGINEERS. 

159 Plerpont Avenue, Salt Lake, Utah. 
Design and Erection of all Classes of Reduction Plants. 
ORES TESTED IN SMALL OR CARLOAD LOTS BY AMALGAMATION, CON- 
CENTRATION. MAGNETIC SEPARATION, MAQUISTEN TUBES. 
Send for our ORE TESTING BULLETIN. 



GEORGE A JAMES CO., THE, 

ASSAYERS AND CHEMISTS. 

Supervision of Ore Sampling, Technical Analyses, Cement Testing. 
No. 28-32 Belden Place (off Bush near Kearny), San Francisco. 



C. A. LUCKHARDT CO., 

(A. H. Ward, Harold C. Ward.) 

ASSAYERS AND CHEMISTS. 

Sampling of Ores at Smetlers. 53 Stevenson St., San Francisco. 



Telephone, Kearny 5951. 



SMITH, EMERY & CO., (Ore Testing Plant, l.os Angeles.) 

INDEPENDENT CONTROL AND UMPIRE ASSAYERS. 

Represent Shippers at Smelters, Test Ores, and Design Mills. 
651 Howard Street, San Francisco. 245 So. Los Angeles Street, Los Angeles. 



HERMAN, John, Assays in duplicate 
Assayer and Chemist. 

Manufacturer of Bone Ash and Mag- 
nesite Cupels. 
252 '4 S. Main St.. Los Angeles. Cal. 



IRVING & CO., James, 

Cold Refiners nnd Assaycrs. 

107 N. Spring St., Los Angeles. Cal. 
Cash for Bullion and Ores. 



LEDOUX & COMPANY, Inc., 

Experts In Metallurgy. Mining 
Engineering, Assaying. 

99 John St., New York. 
Independent Sampling Works: 
New York and Jersey City. 
Representatives at all refineries and 
smelters an Atlantic seaboard. 
Cable: Ledoux. Code: Lieber. etc. 



OFFICER & CO., R. H., 

Assnyers and Chemists. 

169 South West Temple Street. 
Salt Lake, Utah. 



PEREZ, Richard A., 

Assayer, Chemist and Metallurgist. 

(Established 1895.) 
120 N. Main Street. Los Angeles, Cal. 



PETROLOGICAL LABORATORY 

W. Harold Tomllnsou. 

Swarthmore, Pa. 
Petrographic Work. Rock sections made. 
Microscopic examinations of rocks. 



RICHARDS, J. W., 



Assayer nnd Chemist. 

1118 Nineteenth St.. Denver. 
Ore Shippers' Agent. Write for terms. 
Representatives at all Colorado smelters. 



RICKETTS & BANKS, 

80 Maiden Lane, New York. 
Complete ore testing plant. Best 
method of treatment determined. Car- 
load or smaller lots. 



UNION ASSAY OFFICE, Inc., 

Assaycrs and Chemists. 

Box 1446. Salt Lake. Utah. 



WARNER, Hayward D., "^"Ve" - 

(Successor to Sanford & Warner.) 
Umpire. Control, and Specimen Assays. 
Engineers' Work a specialty. For 8 yrs. 
U. S. Custom House Assaycrs. Denver. 



WOOD & CO., Henry E., 

Assnyers. 

1734 Arapahoe St., Denver. 
Ores tested In carload lots. Amalga- 
mation, concentration, cyanide. Wether- 
ell magnetic separator. Blake electric 
separator. Send for circular. 



TH E representative en- 
gineers of the mining 
profession use these pages to 
keep their name and correct 
address before the public. It 
contains more cards than the 
directory of any other mining 
publication. 

It is the one first consulted. 

It is a dignified medium of 
publicity for Engineers and 
Assay ers. 

Professional Card Rales: 

ONE-HALF INCH, J25 PER YEAR 
(48 cents per week) 

COMBINATION RATE WITH 
THE MINING MAGAZINE OF LONDON 
% INCH IN BACH, $40 PER YEAR 

(77 cents per week) 

SUBSCRIPTION INCLUDED 



MINING AND SCIENTIFIC PRESS 



THE BRAUN PLANETARY PULVERIZER 

Will successfully pulverize hard — soft or talcy rock to any degree of fineness 
up to 200 mesh. Capacity to 80 mesh : 1 lb. in 40 seconds, 90 lbs. in 1 hour. 



Simple to operate. 

No expensive parts to 
be replaced. 

The planetary move- 
ment is warranted to last 
indefinitely. 




More easily cleaned 
than a buckboard. 

Grinding Discs are re- 
newable. 

Almost noiseless in op- 
eration. 



PATENT APPLIEO FOR 



But to assure all these advantages you must get the Braun Planetary Pulverizer 
— a product of the experience of the oldest and largest exclusive makers of 
Labor Saving Laboratory Appliances. 



Send for Catalog PS. 




WRITE YOUB 
NEAREST HOUSE 



BRAUN CORPORATION 



SAN FRANCISCOi U. S. A. 



LOS ANGELES) U.S.A. 




Mining *« d Cyanide Plant Equipment 

Settling, Clarifying, Agitating and 
Leaching Tanks 

All Sizes and Dimensions, Made from Best Quality of California 
Redwood. For Prices and Information, address 

Redwood Manufacturers Company 

916 Balboa Bldg., San Francisco 



CALIFORNIA ORE TESTING COMPANY 

A. A. HANKS. • • • President 
F. L. BOSQUI, • Vice-President 
J. H. HOPPS, - - - Secretary 

Complete and modern ore testing plant, equipped with 
units of full working capacity. Is prepared to handle lots 
of from one to two carloads. Testing hy all modern pro- 
cesses for best method of treatment. Not interested in the 
sale of machinery or the exploitation of any particular 
process. 

SEND FOR BOOKLET 



California Ore Testing Company 



630 SACRAMENTO ST.. 



SAN FRANCISCO. CAL. 



Merrell Pipe Threading Machines 
on the Pacific Coast 

There are dozens of Merrell Pipe 
Threading and Cutting Machines In 
successful operation in California 
alone. 

You should remember Merrell 
PIpR Threading Machines are sent 
on the proposition that they make 
good or you may return them at 
makers expense. This guarantees 
design and construction to be right; 
this protects you and every other 
purchaser. 

You should know the points of 
Merrell supremacy. Get the Mer- 
rell catalogue— it's free. Address 




THE MERRELL MFG. CO. 

10 Curtis St., Toledo. Ohio 

PACIFIC COAST agents: 
Pacific Hardware fit Steel Co., San Francisco 



24 



MINING AND SCIENTIFIC PRESS 




"No Ripples" "No Currents" 



To Buyers of Concentrators 

We offer the 




as the most efficient and durable table ever made. 
Not "just as good," but " better." Let us prove it. 

Lodivic Concentrators are manufactured under U. S. Letters Patent Nos. 533,362 
and 641,977 issued to Jacob Lampert, as well as under a license from Arthur R. 
Wilfley and the Mine & Smelter Supply Co., of Denver, Qolo. 

Before buying elsewhere, write us for 
further information, prices and terms 

The Lodwic Concentrator Company 

Suite 308 Columbia Trust Bldg., Los Angeles, Cal., U. S. A. 



MINING AND SCIENTIFIC PRESS 



25 



Traylor Be? Crushing Rolls 

are fitted with features which allow you to produce a uniform product 
with larger capacity at a lower cost than any other form of crusher. 



<U They are fitted with an automatic side adjusting mechanism which operates the stationary 
shaft side ways }4" in every 120 revolutions, thereby presenting a new face continually to the 
movable roll which eliminates corrugating or channeling of the roll shells, and allows you to 
wear the shells down to less than J^" thick without putting a tool of any kind on the roll surface. 




So 




<If They are designed extra heavy, with large diameter of shafts, so that you are able to crush the 
hardest kind of ore, rock or quartz for the least cost of up-keep. 

<ff The many repeat orders we are receiving for these rolls demonstrates beyond the question of 
a doubt the superiority of these machines. 

Send for Catalog G-2, describing in detail the construction of Traylor Rolls. 



We also build a full line of Stamp Mill, Concentrating, Cyaniding, and Smelting Machinery 



Traylor Engineering & Manufacturing Co. 



36 Church St., New York 
Works: Allentown, Penn. 



AGENTS— Harron, Rickard 6 McCone, Los Angeles, San Francisco 
Hallidie Machinery Co., Seattle, Washington 

Mexican Steel Products 6 Machinery Co., Apartado 122-Bis., Mexico City 



26 



MINING AND SCIENTIFIC PRESS 



INDUSTRIAL LOCOMOTIVES 

FOR BURNING COAL, WOOD OR OIL 




The construction of our standard light locomotives embodies all 
the essential features which experience has taught us go to 
make up a satisfactory locomotive. 

They are the product of wide experience, are built for hard work, 
simple in design, have a minimum number of moving parts and 
are accessible for making repairs. The wear and repair of a 
locomotive are in direct proportion to the number of movable parts. 

Every piece of material which enters into their construction must 
first undergo a severe test and must conform to rigid specifica- 
tions. This insures the use of proper materials for every part. 

In buying a locomotive from us you get the benefit of the knowl- 
edge of engineers who make a study of locomotive requirements, 
the experience gained in building over 50,000 locomotives, and 
the guarantee of a $50,000,000 company. 



AMERICAN LOCOMOTIVE COMPANY 

30 CHURCH STREET, NEW YORK 

McCormick Building, Chicago 
Dominion Express Building, Montreal, Canada 
N. B. Livermore & Co., Los Angeles — San Francisco — Seattle — Portland, Oregon 



MINING AND SCIENTIFIC PRESS 



27 



L. D. G. Heavy Duty Compressors 




Cross Compound Two Stage Corliss Compressor Installed at Philadelphia, New York, Mare Island, 
Puget Sound and Pearl Harbor, P. I., Navy Yards. 

<|f L. D. G. Heavy Duty Compressors are 
built with three paramount objects in view: 

<H FIRST: — Perfection of Design, resulting in the compression 
of air with the lowest possible power cost. 

<fl SECOND: — Reliability and Low Maintenance Cost, secured 
by combining the most perfect designs with the best work- 
manship and materials possible to obtain. 

<J THIRD: — Accessibility to all working parts and Freedom 
from Complicated Mechanism. 

<J| These features represent True Compressor Value. As the 

total operating cost will equal the first cost in from two to five 
years, the purchase of a compressor because of its low first 
cost is very poor economy. 

Our Corliss Air Compressors are described in Bulletin L 523-32 



TIT, 



I 



THE LAIDLAW-DUNN- GORDON CO. 

WORKS: CINCINNATI, OHIO :: New York Office: 115 Broadway 
il j ■ ' r 



28 



MINING AND SCIENTIFIC PRESS 



The Leading Mills Endorse Dorr 
Classifiers and Thickeners 

Endorse them by the most convincing of all endorsements — 
by using them in their own work. 

<I For instance: The Santa 
Gertrudis is using 26 Dorr Ma- 
chines. The Tonopah-Belmont 
are installing eight Classifiers 
and eight Thickeners. The 
Real Del Monte have, in all, 31 
Dorr Machines in their numer- 
ous mills. 

<| In fact, Dorr Machinery is a 
part of the equipment of practi- 
cally every up-to-date plant. 

<I Would it not pay you to investigate and see why f Write us - we will gladly go into details. 

THE DORR CYANIDE MACHINERY COMPANY 

733-734 First National Bank Building, Denver, Colo., U. S. A. 




Cable Address : Dorr. 

Codes : Bedford McNeill and Western Union 



Grothe & Carter, Mexico City, General Agents for Mexico 
William Russell, 17 South Street, London, E. C, Special Agent 



"EMPIRE 



yj GOLD 
DREDGES 




Show the largest returns on the investment 
represented, because, while saving all the 
values, tiny require the minimum operating 
and up-keep expense, leaving larger profits 

than any other dredge can show. This is 
"Empire" service. 

"EMPIRE" PRO D s R T L c L T s ,NG 

Have never failed, under any conditions, to do 
more work in less time and at less cost, with 
greater accuracy, than any other prospecting 
drill. 

New York Engineering Company 

2 Rector St., NEW YORK 




Star Drilling Machines are rapid drillers, and they 
do not consume all the profits for renewals and 
repairs. 

There are fewer wearing parts than in any other drill. 
A strong steady pull and a quick positive drop 
are imparted to the drill rope. 

The gear wheel on the bull wheel shaft for rapid pull- 
ing and running in of tools, the slanting Sampson 
post, the solid band wheel, the running board, 
and many other minor improvements, are details 
that you should know about. 

The Star Drilling Machine Co. 

450 PALMER ST. 
AKRON. OHIO. II. S. A. 
Branch Office: Loi Angeles, C*I. 



MINING AND SCIENTIFIC PRESS 



29 



WE SPECIALIZE IN 



PLACER DREDGE MINING EQUIPMENT 



Some of Our Work in 1911 

We designed and installed a dredge with 
special equipment for mining Placer Tin 
in Alaska. 

We dismantled a 7Vi cu. ft. dredge, 
hauled the machinery 33 miles through 
the mountains of California, sawed out 
lumber on the ground, and had the rebuilt 
dredge in operation in 6/4 months. 

We built a 3 cu. ft. gold dredge near 
Nome, Alaska, in 31 days. 

This Season we are building 
5 Gold Dredges for Alaska 

We are prepared to undertake the dis- 
mantling and rebuilding of dredges in any 
district. 




3 Cu. Ft. Gold Dredge Driven by Distillate Engines, 
Operating near Nome, Alaska. 




STERN VIEW OF ABOVE DREDGE 



LET US SEND YOU OUR NEW CATALOGUE 

UNION CONSTRUCTION CO. 

h. g. peake 604 Mission St. w. w. johnson 

San Francisco, Cal. 

Western Union Code ' Cable Address: Unconco 



30 



MINING AND SCIENTIFIC PRESS 




Lowest cost 
per ton of 
material handled 

Buying a belt by its 
first cost is like looking 
through the wrong end 
'-of a telescope — the cost 
merely looks small. 



The whole matter of buying conveyorj'belt 
should sift down to this one bedrock question : 
"How much will it costume per ton of material 
handled?" 

The belt that will handle the most material and carry it 
longer is the belt that costs you the least in the long run; 
and you are' buying belts for "long runs." 

You cannot, of course, know from personal experience that 
GOODRICH CONVEYOR BELTS cost less per ton of material 
handled — but you can be guided by the record of this belt in the hands 
of others in your line. 



For full particulars address — 




The B. F. GOODRICH COMPANY 

Akron, Ohio 

LARGEST IN THE WORLD 



MINING AND SCIENTIFIC PRESS 

TWO BIG FACTS 



The Reinforced Center — The Cushion Edge 




Diamond 

Patent Conveyor Belt 



Reinforced Center 

Note the arrow pointing to the 
extra cover. This added center is 
where all the load is carried and 
abrasion and wear the greatest. 

It more than doubles the wearing 
thickness of the belt. 

The Reinforced Center can be 
made to cover the entire top surface 
if desired. 



1,200,000 tons of material were conveyed by one 
of these belts in the gold fields of South Africa. 

<J More than 50% of all conveyor belts used in South Africa are Diamond 
Belts. 

<B We compete with the world's best belt builders in securing this 
business — and on an efficiency basis the Diamond Belt always wins. 
<5 In the United States Diamond Belts are conveying annually billions of 
tons of material — slashing records by their wonderful feats of endurance. 
<J[ We have facts and figures to lay before you which knock mere claims 
into a cocked hat. The only thing of interest to you is the reduction of 
your conveying costs. We have tangible proof of exactly what we can do. 
<|[ Centralize your responsibility — put it up to us to cut your cost — our 
combination of knowing how to build a belt and having belt experts to 
assist you in selecting the right belt for the right place is the best guar- 
antee in the world for getting most for your money. 

<|[ Then Write Us To-day for a sample of this Belt — get in touch with Diamond 
goods and Diamond service. 

THE DIAMOND RUBBER CO. 

AKRON, O. 

DISTRIBUTING STATIONS IN ALL PRINCIPAL CITIES 



Cushion Edge 

Note the arrow pointing to the 
Cushion Edge. It takes all the wear 
due to side rails and idlers, and the 
fabric is never reached. 

When the edges of an ordinary 
belt wear slightly the fabric is ex- 
posed, moisture is admitted, the 
plies separate and the belt speedily 
ruined. 



32 



MINING AND SCIENTIFIC PRESS 



ruggles AERIAL CARRIER 

WILL DO EVERYTHING BUT TALK 



m _ .' — ; ^ mff 









This cut shows the Ruggles Aerial Carrier being used in the exca- 
vating of a canal. The material is being picked up and deposited 
on the sides. Later when the canal was completed and the water 
turned in, the same equipment was used to pick up the rock 
and load it into barges for transportation to a crushing plant. 



THE use of this device reduces your 
aerial transportation system to the 
most simple form and allows the lowest 
possible cost of operation. With it there is 
no endless traction rope, and a single drum 
engine is ample for power purposes. 

The Ruggles Aerial Carrier will lift a skip, 
or other load, from any distance to the 
cable, automatically unlock itself, move in 
either direction on the incline, automatically 
lock and either dump the skip in the air or 
lower a load to the ground. All these 
operations are controlled by the hoisting 
engineer through a single line from the 
hoisting drum and with no signal except that 
to start. The return trip is equally simple 
and automatic. 

The brake on the carrier is independent 
and does not hold by gripping the cable, 
thereby reducing the wear on the latter to 
an absolute minimum. 

SEND FOR CATALOGUE A. 



RUGGLES MACHINE CO., 



POULTNEY, 
VERMONT 



Hydraulic Mining Machinery 




DOUBLE-JOINTED BALL-BEARING GIANTS 

Showing Giant with Weighting Attachment 

Riveted Iron and Steel Pipe Gravel Elevators 
Riffles Gates Giants Water Lifts 
Steel Sluices Penstocks 

These are the advantages we offer : Promptness in filling orders, 
careful packing to economize freight space and insure delivery in 
good condition, personal supervision of shipment and for our out- 
put, first class material made up by first class workmen. 

WRITE FOR CATALOGUE 

HYDRAULIC SUPPLY MANUFACTURING CO. 

SEATTLE, WASHINGTON 



MINING AND SCIENTIFIC PRESS 



33 



The Extensive Use of Westinghouse Motors 
For Mine Pump Ser- 
vice Proves Their 
Great Reliability 




Westinghouse Motor Driving Mine Pump 



Only a thoroughly reliable motor can be 
used for driving mine pumps. 

The pump must run day and night; the 
atmospheric conditions are very unfavor- 
able; and the motor is often located in re- 
mote places where it can be inspected at 
infrequent intervals only. 

Hundreds of Westinghouse Motors have for years given thoroughly satisfactory 
service in mines. 

Their reliability, proved beyond question, is the result of experienced design, careful construc- 
tion, and rigid tests after completion. 

Westinghouse motors can be supplied for every kind and size of pump. To insure satisfactory 
operation, specify Westinghouse motor when ordering your pump. 

Westinghouse Electric & Mfg. Co., East Pittsburgh, Pa. 

SALES OFFICES IN 45 AMERICAN CITIES 



'if 



Illustration No. C-256 (Lower View) 
This Is a companion picture to Illus- 
tration < '-257. The same bucket after the 
operation, tilled with a good 1% cu. yds. 
of "rotten rock," a very difficult material 
to dig. This bucket handled it without 
blasting. 




This VA cu. yd. 
HAY WARD DRAG 
SCRAPER BUCKET 
handles over 2 cubic 
yards of top soil each 
trip. 

Further, it will dig this 
load in less than twice its 
own length. 

It never balks nor hesi- 
tates, but takes loam or 
"rotten rock" with ease — ■ 
digging it without blast- 



Illustration No. C-257 
A Hayward Drag Scraper Bucket digging 
in "rotten rock." Note the angle at which It 
is digging and the pieces of rock in its wake, 
torn loose by the teeth before It settled to dig 



Every connection flexible — not a single rigid bail in its make-up. Nothing to break as it 
lands on side or stomach. There is less strain on the operating machine, because the Bucket 
may be picked up as soon as filled — without dragging it "home." This new 

Hayward Drag Scraper Bucket 

works perfectly at any angle. It requires but two men and less than three minutes 
time to change from a hard to soft digging Bucket. Where other Buckets have 
cross bracing and hoods which prevent them from entering the material, the 
Hayward Drag Scraper has an open front so that in digging, large boulders 
and large rocks are easily handled. 

Get the facts from us — say Pamphlet 582 on a postal. 



THE HAYWARD COMPANY 



50 CHURCH STREET 



NEW YORK 




Manufacturers of 
Dredges, Skid Exca?ator« Or- 
ange Peel, Clam Shell Buckf It (or Pacer Mining — 
Loading Cruel — Mining; Gold — Digging Canals 
and Ditches— Stripping Iron, and ior Rehandiing 
and Digging Purpose! Generally. 



34 



MINING AND SCIENTIFIC PRESS 



STEEL MINE TIMBERS 

used when driving new heading will result in a large decrease 
in the amount of excavating to be done, and when used to 
replace wooden sets in retimbering will give a considerable 
increase in the clearance on both sides and the top of the 
heading. They will also save their users many times their 
cost, not only in preventing loss of life, in providing protec- 
tion against cave-ins and fires which may put the mine out of 
commission, but in every place where wood is liable to prove a 
means of destruction by falling under stress, decay or burning. 

Carnegie Steel Company 

GENERAL OFFICES: PITTSBURGH, PA. 

Catalog and Technical Pamphlet may be had on request. 




NEW HOIST CATALOGUE JUST ISSUED. SEND FOR l\ 



CLEVELAND, OHIO, U. S. A. 

NEW YORK, Hudson Terminal. DENVER, 611 Ideal Building. MEXICO, D. F., Apartado 1220. 



MINING AND SCIENTIFIC PRESS 



35 



A NEW SULLIVAN DRIFTER 



The Sullivan "Lightweight" Class "FF12" Rock Drill is a 
new one-man drifting drill, in which light weight, drilling 
speed, long life and labor economy are emphasized. 



It is claimed for the "Lightweight" 
drill that it does the work of a 3-in. 
or 3% -in. machine. Requires one 
man instead of two, and uses 
from 20 to 25 per cent less air for 
the same work. 

New Bulletin No. 1366F 



Air Compressors 
Hammer Drills 



Diamond Drills 
Hoists 



Sullivan Machinery Co. 

461 Market St., San Francisco 



Birmingham, Ala. 
Boston 
Butte, Mont. 
Chicago 
Cobalt, Ont. 
Denver, Colo. 
El Paso 



Joplin, Mo. 
Knoxville 
London, Eng. 
Nelson, B. C. 
New York 
Paris, France. 
Pittsburg 



Salt Lake 
San Francisco 
Seattle 
Spokane 
St. Louis 
Sydney, N. S. W. 




TWO YEARS AGO THE CALUMET & HECLA MINING COMPANY 

Wrote "We find the Hardinge Conical Mill the most efficient 
grinding machine we have yet gotten hold of." 

They now substantiate this statement, after two years of con- 
tinuous use, by constructing a plant to contain 






8 FT. HARDINGE REGRINDING MILLS 



Sales Agents for 
The Mine & Smelter Supply Co., Salt Lake City, Utah. 



( UTAH 
J MON1 
) NEVA 
I IDAHC 



UTAH 

JTANA 
EVA DA 
IO 



50 Church Street, New York 

(Denver Office, 601 Ideal Building) 



36 



MINING AND SCIENTIFIC PRESS 



Won't Crack, Break or Lose its Insulating 
Value from Vibration or Rough Usage 

The temperature of high pressure pipes soon dries out molded and ordinary' pipe coverings. Then 
expansion and contraction of the pipes and vibration reduce the carbonate of lime ( chalk ) and other 
like materials with which these coverings are filled to a powder. This powder settles at the bottom of 
the canvas covering, leaving the top insufficiently covered, and gradually sifts through the canvas. Thus 
what little insulating properties they originally had are quickly lost. 

J-M Asbesto-Sponge Felted 
Pipe Covering 

retains its high insulating properties indefinitely. Pipes covered with it can 
even be walked upon without injury. This is because it is made of many 
layers of fine paper, composed of pure, long-fibred Asbestos and a small 
quantity of granulated sponge. It has been found in perfect condition after 
more than fifteen years' service on underground pipes. 
Can be taken off pipes and replaced without injury. 

Ask nearest Branch For Sample and Booklet 

H. W. JOHNS -M AN VILLE CO. 



M A N I* FACri'REBS OF ASBESTOS 

and Magnf.sia Products 



Asbestos Roofings, Packings, 
Electrical Suim-liks, Etc. 



Baltimore Cleveland 
Boston Dallas 
Buffalo Detroit 
Chicago 

For Canada 
Toronto, Ont. 



Indianapolis Milwaukee New York Pittsburgh 
Kansas City Minneapolis Omaha San Francisco 

Los Angeles New Orleans Philadelphia Seattle 

St. Louis 

THE CANADIAN H. W. JOHNS -MAN VILLE CO., LIMITED 924 
Montreal, Que. Winnipeg, Man. Vancouver, B. C. 




THE MERRICK CONVEYOR WEIGHTOMETER 

An automotic weighing machine which weighs and records the 
load of any material in the act of that material passing over belt 
or bucket conveyor or other continuous conveyor systems. 




Although the MERRICK WEIGHT- 
OMETER is not a direct producer, 
the operation of every mine, mill 
and smelter may be made less costly 
by economies which will be indi- 
cated as desirable by the accurate 
record of material handled, obtained 
by this apparatus. 



Many users — every one a booster because of guarantees fulfilled 
and results gained. 

WRITE FOR CATALOGUE. 

Merrick Scale Manufacturing Company 

PASSAIC, PM. J. 



MINING AND SCIENTIFIC PRESS 



37 




Cubic 
Yards 



Oct., 1911, 70,000 
Nov., " 57,408 
Dec, " 79,600 
Jan., 1912, 65,384 
Feb., " 43,300* 
Mar., " 61,746 

Average, 62,906 



Running 
Time, 

- 86% 

- 84% 

- 83% 

- 80% 

- 78% 

- 82% 

- 82.1% 



NOTE.— During the month 
of February it was 22° F. be- 
low zero. 



ACTUAL RESULTS ARE WHAT COUNT 

Read the above yardage and running time made by one of our 

5-ft. open type Gold Dredges operating in Idaho. 

The latest dredge built in the Oroville field was made by the 

UNION IRON WORKS CO. 

SAN FRANCISCO 



Thew Shovels for Underground Mining 

Because of its horizontal dipper crowding motion, the THEW shovel can be employed 
in underground work with overhead clearances as low as 10 feet by making use of a 

special design for boom. The full circle 

swing of the THEW shovel permits its 
convenient use under usual mining condi- 
tions. The machines may be mounted 
either upon car wheels or traction wheels 
and may be equipped for operation by 
compressed air or electricity. 

Thew Shovels 

of the FULL CIRCLE SWING type are built in six 
standard sizes, ranging from 12 to 50 tons in weight, 
and from one-half yard to two yard dipper capacity. 

Numerous modifications have been made to 
adapt the shovels to special conditions or to render 
the machine available for service of a miscellaneous 




nature. 



AS TO QUALITY 



Zinc Ore Mining at Joplin. 



we refer to any owner of any THEW shovel any- 
where. 



Shovels for All Classes of Mining Operations 

Underground mining or surface work, open cuts, ditch construction 

or rehandling tailings. 



WRITE FOR INFORMATION 



THE THEW AUTOMATIC SHOVEL COMPANY, 



LORAIN, 
OHIO 



38 



MINING AND SCIENTIFIC PRESS 



Seldom on the Pay Roll 
Always on the Job 

Wntth Sork iritis 

Day in, day out, always, ceaseless drilling — drilling — drilling. That's a Wood Rock Drill! Rarely 
needs repairing; requires little attention. 

Never, like poor drills, continually at the cashier's window, spending more and still more money. 

The master mind that planned the first Wood Drill twenty-one years aeo, is 
still overseeing every detail of its manufacture now. If we weren't progressive we 
could well say "Here we rest our case " — but we're not the 'resting" kind. 

Ours is the one drill that's "certain." The one drill you can depend upon. 
The one drill that carries a guarantee which means something ; ' ' We guarantee 
Wood Drills against any defects during the entire life of the drill. We guarantee 
Wood Drills to do more work, cost less for repairs, and stay on the job longer 
than any other drill on earth." 

IS THAT BROAD ENOUGH? 

Write for our Catalog to nearest Agent. 

30 DALE AVENUE agents: PATERSON, N. J. 

HAMMOND MFG. CO., Portland, Ore. CANADIAN FAIRBANKS CO., Vancouver. B C. 



THE EDWARDS ROASTER 




Is being successfully adapted to every roasting problem — as evidenced by recent sales to : 

The Golden Cycle Mining Co. (9th machine), for roasting Sulpho-Telluride Ores. 
The Goldfield Consolidated Mines, for roasting Concentrates. 
Robt. Lanyon Zinc & Acid Co., for roasting Zinc Blende. 
Primos Chemical Co., for roasting Vanadium Ores. 

EXPLAIN YOUR CONDITIONS AND REQUIREMENTS TO 

THE STEARNS-ROGER MFG. CO., Denver, Colo. 

Manufacturers of Mining and Milling Machinery. 





MINING AND SCIENTIFIC PRESS 



39 



"S-A" Belt Conveyors for Bedding Concentrates 

The application of modern methods in the handling of their ore 
has enabled the Cananea Consolidated Copper Company to place their 
low grade ore properties on a paying basis. 

The latest conveying system installed has been applied to the 
bedding and reclaiming of concentrates. The concentrates are received 
in gondola cars, and in order that a uniform grade may be delivered 
to the furnaces, they are " bedded." A system of three " S-A " Belt 
Conveyors brings the concentrates from the gondola cars — the third 
conveyor on the bridge distributes over an automatic tripper on to the 
pile. A system of three other "S-A" Conveyors reclaims the ore and 
delivers to pockets above the furnaces. 




The new "S-A" Unit Carrier has 
features of advantage which should 
be familiar to all mining men. 

It is the strongest carrier on the 
market, and yet is lighter in weight 
than any other carrier of correspond- 
ing size. 

The light weight and strength is 
secured by the pressed steel con- 
struction with drum type pulleys, 
mounted with double supports. 

Dust-proof ball bearings eliminate 
the attention required by other 
carriers. 

The carrier is almost frictionless 
and saves the belt. 

Adaptable to all operating con- 
ditions. 

The "Labor Saver" gives 
Conveyor News 

Tell us your name and the position 
you hold, and we'll send you this 
monthly magazine without charge. 
It's of interest to all mining men. 




Let our 
engineering 
board solve 
your con- 
veying pro- 
blems. 



Stephens - Adamson Mfg. Co. 

AURORA, ILLINOIS 

New York Chicago Pittsburgh Portland St. Louis 

Los Angeles San Francisco Birmingham 



Conveying, Elevating and Hoisting Machinery. Robina Coal and Coke Cmshers. 
We carry a complete stoclc of Chains and Sprockets. Write for monthly bulletins. 
ROBINS CONVEYING BELT COMPANY 

Main Office : 1 3 Park Row, New York San Francisco : The Griffin Company 
Chicago: Old Colony Building Spokane: United Iron Works 



The 
Lane Mill 




In several plants Is saving 95 to 98% by amalgamation. The Initial 
and operating costs are less than stamps. 

Full details on request. 

LANE MILL & MACHINERY COMPANY 

Successors to Lane Slow Speed Chilian Mill Company, 
236-247 Douglas Bldg., Los Angeles, California 



The C. 0. Bartlett & Snow Co. 

CLEVELAND, OHIO, U. S. A. 

Manufacturers ot 

Coal Tipples, Elevator Buckets 
Elevating Machinery 

Mining Machinery 
Phosphate Machinery 
Steel and Belt Conveyors 

Ore and Clay Dryers 
Coal Handling Machinery 
Shaking and Revolving Screens 
Malleable and Drop Forged Chain 
Gypsum Machinery 



and are also exclusive 
manufacturers ot 



The Greene Selt Dumping Car Haul 



4(1 



MINING AND SCIENTIFIC PRESS 




Knight Water Wheels 

KNIGHT & CO. 

SUTTER CREEK, CAL. 

These wheels are made to be direct 
connected to generator shaft and are used 
under all heads from 10 to 1,000 feet 

Catalogue containing 70 pages on Hydraulic 
Machinery and Centrifugal Pumps. 

D. D. DEM AREST CO., Agent 

503 Mai-Vet St. San Francisco, Cal. 




2 Stage Turbine Station Pump direct 
connected to Electric Motor. 



Jackson Turbine Station Pumps 

FOR HEAVY DUTY 

Designed to work against any head. Made with bronze 
fittings for handling acid waters. 

Split on center line for convenience in dismantling and 

inspection. 

WRITE FOR CATALOG 

Byron Jackson Iron Works, Inc. 



357-361 Market Street 

Lob Angeles— 212 No. Los Angeles St. 



San Francisco, California 

Works— West Berkeley, California 




ANY HEAD 
ANY QUANTITY — 
BUT ALWAYS 
HIGH 
EFFICIENCY 

Alberger Pump Company 

140 CEDAR ST., NEW YORK 

Chicago St. I on Pittsburg San Francisco 



When Looking for Pumps 

for any service be sure to remember 

Jeanesville Pumps 



We build them in all sizes, both steam and centrifugal, 
and both have very desirable and distinctive features. 
Better have our two new catalogues J 36-32 and J 40-32 



I 



THE JEANESVILLE IRON WORKS CO. 



WORKS: HAZ^ETON. PA. 



A Guide to Technical Writing 

By T. A. R1CKARD 

Second Edition 174 Pages Indexed $1 Postpaid 

Mr. Rickard's book will help you to present your ideas 
in such a convincing way that every one will exclaim, 
"that man knows what he is talking about." Send for 
A Guide to Technical Writing. You will read it through at 

the first sitting. Published and for sale by 

MINING AND SCIENTIFIC PRESS 

420 Market St., San Francisco, Cal. 

THE MINING MAGAZINE 
819, Salisbury House, : London, E. C. 



MINING AND SCIENTIFIC PRESS 



41 



Built on a Solid Base 



The Reputation of Prescott Mine Pumps 

Why? Because the initiation of the business was not an acci- 
dent of chance, nor a broadening out to embrace the mine pump 
field because it was attractive. Read the Condensed History 



Corliss Cross Compound High 
Duty Mine Pump- 
ing Engine 





From 1885 to 1894 Fred. M. Prescott dealt in mine 
machinery and supplies. Meantime mining practice was 
changing. The originally shallow mines grew deeper 
with attendant increase of water and fuel costs, creating 
the necessity of heavier and more efficient pumps. As 
builders of pumps Mr. Prescott represented could not see 
that their standard types were outgrown, he began to 

Works: 
Milwaukee, Wis. 

New York Office: 
115 Broadway. 




build them for local trade. Their immediate success de- 
veloped a demand that forced him to devote himself to 
their manufacture. Subsequent history is familiar — the 
growth of the business until it included the building of 
the most successful pumps in a wide rang 5 of patterns to 
meet every sort of mine service. This is well attested by 
our Catalogue P 22-32. It proves "Who builds the best 
Mine Pump? PRESCOTT." 

Branch Offices 
in all 
Principal 
Cities 

P129.4 



WOOD-LINED MINE 

PUMPS 

FOR HANDLING ACID MINE WATER 




The Deane of Holyoke 

can meet any condition of pumping service 

Bulletin D 43-32 illustrates and describes 
our mining pumps 



([the deane 

^ WORKS: HOLYOKE. MASS. 



STEAM 



PUMP coll 

Ne» York Office : 1 1 5 ' Broadway I 



Branch Offices in all Principal Cities D 199.: 



No Other Pump Equals the Economy 
of the "American" Centrifugal as 
a Mine Pump 



It combines the highest development of 
the centrifugal principle of pumping with 
greatest simplicity of construction. 

Plowlines are worked out to the easiest 
possible curves and interior of casing and 
impeller are machined true and accurately 
adjusted, preventing back-flow. 

There are fewest number of parts, all 
passages are cast in the casing and all 
parts are easily accessible without dis- 
turbing the pipe connections. 

Our sinker and mine station pumps 
have many advantages over old-style 
plunger pumps for these purposes. 

American Centrifugals are made in over 
60 regular styles, backed by longest ex- 
perience and largest output. 

They are described in General Centrif- 
ugal Pump Catalogue No. 117, the most 
complete ever issued. Write for it. 

The American Well Works 

General Office and Works 
Aurora, Illinois 

Chicago : Firit Nat' 
Bank Building 
San Francisco : 
70 Fremont Street 

L"» Aegeles : 
341 S. Los Angeles St. 





42 



MINING AND SCIENTIFIC PRESS 



Hendy 
Mill Units 



Usually, in the beginning, when the investment 
is small, it is necessary to employ machinery which 
does not require much outlay of capital. 

Hendy mills are built as a system of units. 

Hendy improved triple discharge two-stamp 

mills are the 




first of 
units. 



the 



Their capa- 
city is suffici- 
ent to warrant 
installation in a 
battery of two 
or three mor- 
tars for perma- 
nent work — 
all details are 
equivalent to 
our standard 
mills. 

Once the 
mine proves 
good and you 
wish to begin 
operations on 
a large scale, 
this two-stamp 
mill simply 
forms the nu- 
cleus of your 
plant. 

Many of our 
customers in 
different parts 
of the world 
have begun 
operations in 
this way — it's 
a good begin- 
ning. 



Illustrations and complete information con- 
cerning this Hvo-stamp mill, as well as the 
larger Hendy mill units, will be found in Bul- 
letin 113 — send for it. 

Joshua Hendy Iron Works 

(Sole Manufacturers) 



San Francisco 



California 




Twelve Progressive 
Wheel Manufacturers 



have adopted the Hyatt Flexi- 
ble Roller Bearing. Any of 
these twelve could make a solid 
roller bearing at a lower cost 
than the price of the Hyatt, 
but with their knowledge of 
the severe conditions under 
which mine cars operate, they 
selected the Hyatt Flexible 
Roller Bearing. 

Bulletin 604E (new edition) 
illustrates and describes the 
various designs, one of which 
is sure to be exactly suited to 
your requirements. A postal 
brings it. 



Hyatt Roller Bearing Co. 

3 Newark, New Jersey ■ 



OT-. 



MINING AND SCIENTIFIC PRESS 



43 




You may fly 

if you know how 
to handle 
an aeroplane 
and the 
weather conditions 
are right. 



I 



F you wish to transport your goods safely and economically 

in all kinds of weather, it can be done with a 



BLEICHERT AERIAL TRAMWAY 



like the above, which is from a snapshot photograph of such a line at the works of 
The Trenton Iron Company, taken at the moment Mr.'Chas. K. Hamilton was passing 
on the return trip of his famous aeroplane flight between New York and Philadelphia. 

ILLUSTRATED BOOK MAILED FREE UPON APPLICATION. 

THE TRENTON IRON COMPANY 

TRENTON, N. J., and 30 CHURCH ST., NEW YORK 

American Steel & Wire Co.: Denver, Colo., and Salt Lake City, Utah. 
United States Steel Products Co.: San Francisco, Cal.; Los Angeles, Cal.; Portland, Ore.; Seattle, Wash.; Mexico City ; 
Montreal, U"e.; Toronto, Ont.; Vancouver, B. C, and Winnipeg, Man. 



The name to remember when 
you order a 

WIRE ROPE 



ROEBLING 



Why? 

Because it has stood for the best 
in materials and workmanship since 
wire rope was first used in mining. 



John A. Roebling's Sons Co. 



San Francisco 
Los Angeles 



Seattle 
Portland, Ore. 



Works: Trenton, New Jersey 



« 



Lawson" Tramways 

most efficient and economical system 
of transportation on the market 




Macomber 6 Whyte Rope Co. 

General Selling Agents. Ask for Catalogue " I " 

510 S. CLINTON ST. CHICAGO 

Wire Rope for every purpose 



44 



MINING AND SCIENTIFIC PRESS 




Shortage Of Water Need Not 
Interfere With The Cyanide 
Plant Where 

"TDe Oliver"fflter 

Is Installed 

Many mines that dispose of filter tailing 
by sluicing are seriously handicapped 
this year by the prevailing water short- 
age. Where Oliver Filters are installed, 
it requires but few changes to discharge 
the tailing dry. This will reduce water 
consumption more than half, without 
affecting the filter efficiency or capacity. 
If you are facing water shortage, write, 
asking for details of our new atomized 
wash and the cost of changing from wet 
to dry discharge. 

Mr. Mine Owner, if you are thinking 
about a new filtering equipment, this 
is a little point for you to consider. 
You may have enough water now, 
but shortage will come sometime. 
Our laboratory and our engineering 
services are at your disposal. 



Oliver Continuous filter Co, 




Plain Whistle with 
Valve 



LUNKENHEIMER 
WHISTLES 

produce clear, bell-like tones that can 
be heard for miles. 

They are made in a large number of 
varieties — Single Bell having but one 
lone : Single Bell Chimes, or Three Sepa- 
rate Wtistles on a Branch, both styles 
producing three distinct tones, and 
Variable Sound Whistles, provided with 
pistons from which any tone desired 
can be obtained. 

Owing to the correct proportions of 
Lunkenbeimer Whistles, they are very 
economical, as a very small expenditure 
of steam or air is necessary to obtain 
satisfactory results. 

They are exceptionally neat in design, are very strong 
and durable, and satisfaction is guaranteed. 

Specify and insist upon securing 
genuine Lunkenheimer make. Do not 

accept substitutes— they are never as 
good as the genuine. 

Your local dealer can furnish them ; 
if not, write us. 

Write for 1912 catalogue. 

THE LUNKENHEIMER COMPANY 

Largest Manufacturers of High Grade En- 
gineering Specialties in the World. 

General Offices and Works: 

CINCINNATI, OHIO, U.S.A. 



NEW YORK 

chic wao 

BOSTON 
LONDON, S.E. 



61-68 Kulton St. 
186 N. Dearborn St. 
- 138 High St. 
35 Great Dover St. 




Single Bell Chime 
Whistle with Valve 



DRIVE YOUR TUNNELS 
QUICKLY and CHEAPLY 



BY USING 



(SUNT) 

EXPLOSIVES 

The driving of tunnels in ore mines can be accom- 
plished at a considerable saving of time and cost of 
labor by resorting to the following Brands: 

Forcite, or Repauno Gelatin Dynamite 

These explosives are noted for their rending power 
and the minimum fumes resulting from their detona- 
tion. If very hard rock is encountered, we recom- 
mend the loading of a few cartridges of Blasting 
Gelatin in the back of bore-holes with Gelatin Dyna- 
mite on top of them. 

To be able to complete tunnels economically, you 
should use Du Pont Explosives exclusively. Just 
which one is best suited to the condition found in 
your mines may he learned by asking for High Ex- 
plosives Catalog No. 119, or stating your problems to 
our Technical Division. 

Du Pont Powder Company 

WILMINGTON, DELAWARE 



MINING AND SCIENTIFIC PRFSS 



45 




If you heard of a drill that could be installed anywhere that an electric wire could be run, either above or below 
ground, at less than one-third the cost of pipe lines, wouldn't you be interested? 





If you learned of a drill that would actually .save 70% to 90% of what you are now paying for power and at the 
same time advance your work faster, easier and better than ever before, wouldn't you be anxious to learn the particulars 
about it? 




If we claim the Fort Wayne Electric Rock Drill will do all this and offer to send you a Bulletin that explains the 
design, construction, and operation of the drill, don't you think it would be worth while writing for it? 





FORT WAYNE ELECTRIC WORKS 

Of General Electric Company 

ROCK DRILL DEPARTMENT MADISON, WIS. 

Factories: Fort Wayne, Ind., and Madison, Wis. 



San Francisco Office: 301 Rialto Bldg. 



Seattle Office: 325 Co 1 man Bldg. 



16 



MINING ANu SCIENTIFIC PRESS 



Gut Your Drilling Costs 



THE 




DOBBINS 
GORE 
DRILL 



OCCUPIES MUCH 
LESS SPACE 

IS MORE 
CONVENIENT 
FOR OPERATION 

MUCH LESS SUBJECT TO BREAKAGE 

HAS 25 TO 50% GREATER 
EFFICIENCY 

THAN ANY CORE DRILL OF EQUAL 
RATED CAPACITY 



Let Us Send You Catalogue "IT 

THE MANHATTAN DRILLING COMPANY 

No. 25 Broad Street New York City, N. Y. 



Goodyear "Step" Concentrator Belt 




The surface of the Gates Improved Step Concentrator 
Belt is composed of a series of transverse steps, with 
"treads' % in. wide and 'risers' 1/32 in. high. When the 
belt is running on a concentrator the 'treads' are hori- 
zontal. 

^ Flow ol Water 




Travel oi Belt 
Full-sized Section 

This design prevents the heavy particles of mineral 
from escaping down the belt by holding them on each 
step, until dense enough to discharge the sands, when, 
due to the combined motion of the machine and flow of 
water, they gradually travel toward the mineral dis- 
charge end of the machine. 

With this belt it is almost impossible to overload a con- 
centrator, because even if a few steps are overloaded, the 
lower part of the belt holds the minerals until separated. 
The efficiency of a machine equipped with this belt Is 
therefore greatly increased, and produces cleaner con- 
centrates. 

Our patent edge is used on the Gates Improved Step 
Concentrator Belt. The edge will stand up in passing 
around drum, and will not crack. 

MECHANICAL RUBBER GOODS 
DREDGING SLEEVES, BELTING, HOSE, PACKING, ETC. 

GOODYEAR RUBBER CO. 

WRITE FOR' COMPLETE CATALOGUE. 
587-589-591 MARKET STREET 61-63-65-67 FOURTH STREET 

SAN FRANCISCO. CAL. PORTLAND. ORE. 



Mil A PROOF 




NOT AN ARGUMENT 

On the PANAMA CANAL .... 80# 

On the CAT8KILL AQUEDUCT - - - 75ft 
On the NEW YORK STATK BARGE CANAL - 50% 

of all the HOCK CRUSHING is being done with 

McCully Gyratory Crushers 

Could ANYTHING be MORE CONVINCING 
of Their M KBITS? 

Of course these are exceptionally large jobs. 

That is just why we mention them. There are a great 
many different contractors involved and it is evident 
how many of them agree as to which is THE crusher. 
Moreover it is for such larije jobs that the greatest care 
is taken to select the BBSS crusher. Only the best is 
good enough. 

On small jobs this is not so important- But — we could 
go on and give a long list of smaller jobs where our 
crushers are the ONLY ones used. 

If you want to know WHY the McCully Crusher is 
preferred to all others, send for our bulletin PM-432. 



DOWER» 




COMPANY 



CUDAHY (^lTOkSTb) WIS.. U. S. A. 

LHstrlct Offices: New York, Chicago, El Paso, San Francisco 

M 172.2 




Vulcan Electric Hoists 



The above illustrated hoist, now in operation 
at the mines of the Carbon Hill Coal Com- 
pany, Carbonado, Wash., is one of many 
recently shipped to the Northwest, and if 
you are interested in good electric hoists 
it will pay you to see it in operation. 



SEND FOR OUR CATALOGS 



VULCAN IRON WORKS 

WILKES-BARRE, PENNA. 

ESTABLISHED 1849. 

New York Office— 60 Church Street 
Hpokani, Wash. - ai. U. Hoffman 



MINING AND SCIENTIFIC PRESS 



47 



CASE GASOLINE BURNER 



GOODAL BROS., ASSAYING. 

Helena, Montana, May 24, 1912. 

DENVER FIRE CLAY CO., Denver, Colorado. 

Gentlemen: We have been using your Case Burner 2", and find it the most comfortable burner we 
have ever worked with. After a month's service the plugs are still tight and there is no leakage. It is so 

far ahead of the burner that there is no comparison. The other burners we don't consider at all. 

Sincerely yours, GOODALL BROS, (by Herbert Goodall.) 

MADE BY 



THE DENVER FIRE CLAY COMPANY 



DENVER, COLORADO 



U. S. A. 



SALT LAKE CITY, UTAH 




Have you ever considered using a loco- 
motive crane at your mine or mill? 

Being self-propelled and having complete rotation 
of the boom, it will handle all your ore and other 
material rapidly and at a low cost. The illus- 
tration shows a Brownhoist crane loading ore, 
lj4 to 3 tons at a load, with only one man, the 
operator, of the crane. 

Our catalog shows t/iis crane in use 
at mines and mills. Write fur it. 

THE BROWN HOISTING MACHINERY CO. 

CLEVELAND, OHIO 

New York Pittsburgh Chicago San Francisco 



Quarrymen who have not used "BUSY BEE" HAMMER DRILLS 

would do well to inquire of those who have. 

To break up boulders or large pieces of stone and for general 
cleaning up about a quarry, the "BUSY BEE" Hammer Drill is an 
indespensible tool. Over 200 feet of blast holes has frequently been 
drilled with one of these hammers in a day. Real economy in the 
quarry is attained where "Busy Bee" drills are used. 

Full particulars are given in the "Busy Bee" Hammer Drill 
Bulletin. Send for it. 

McKIERNAN-TERRY DRILL CO. 

BROADWAY AND CEDAR ST., .... NEW YORK 

Canadian Representatives: Canada Foundry Co-, Ltd., Toronto, Ont 

Rock Drills, Core Drills, Sheet Pile Hammers, Air Compressors 3 





WRITE FOR BULLETINS 

Sutton, Steele & Steele, Inc. 

Dallas, Texas 



s. s. & s. 

Dry Concentrating Table 

Capacity three times that of the best types of wet 
concentrating tables. 

Especially adapted to the treatment of refractory 
ores having close specific gravities. 

The S. S. & S. System of dust control eliminates 
all dust made in dry crushing. 

COMPLETE TESTING WORKS FOR ORE TESTING 



48 



MINING AND SCIENTIFIC PRESS 



Kilker's Matte Tapping Car 

THE CORRECT METHOD OF HANDLING MATTE 




The 16 pans in this tapping ear will hold 3,000 pounds 
of copper matte, yet they can be easily revolved with a 
bar and operated by one-man power. When a tap is 
being made the matte strikes in the successive pans and 
the entire mold is filled up by a series of layers of matte, 
which solidifies in thin layers, making it easy to crush 
for later operations. 

It is possible to tape 3,000 pounds every 30 minutes. 
Dumping is accomplished by putting a bar under the 
back lug of pan and tipping it up slightly. The over- 
balance does the rest. Only a few minutes required for 
the entire car. Cakes are in simple form for handling. 
The first cost is low. It has been in use for years. It is 
durable, efficient and simple. 

Send for Descriptive Circular. 

PACIFIC FOUNDRY CO. 

18th and Harrison Sts , San Francisco, Cal. 



PACIFIC 
ROCK DRILL 

MADE IN SEVEN SIZES 

The distinguishing fea- 
ture of this drill is the 
fact that the guide lugs 
on the cylinder and the 
corresponding seats on 
the shell are not in the 
same plane, thus abso- 
lutely preventing side 
play when the guides and 
seat become worn. 

I* Send for our Circular 30 showing 
full details. 

Low cost of up-keep. 
Few wearing parts. 
Light in weight. 
Variable stroke. 
Simple design. 

D. D. Demarest Co. 

503 Market St. San Francisco, Cal. 





For the Prospector and Miner 

A book written entirely to meet the wants of 
miner and prospector who has had no technical train- 
ing. The salient facts of geology, mineralogy, petrol- 
ogy, and mineral deposits are given in plain and 
easily understood language. It is certainly the best 
book of its kind yet published, and we highly recom- 
mend it. 

Written by W. D. HAMMAN 
224 Pages 70 Illustrations Cloth, $2.00 

FOR SALE BY 

MINING AND SCIENTIFIC PRESS 

420 Market Street, San Francisco 



Santa Cruz 

"The Atlantic City of the Pacific Coast" 

Is planning a 

WONDERFUL 

Water Pageant 

For the following dates : 

Tuly 20th to July 28th, Inclusive 

Yacht Regattas — Motor Boat Races Review of 
American Battleships Parade of Decorated 
Water Floats Swimming and Rowing Contests 
— Surf-bathing Dancing — Golf — Tennis — Fire- 
works. 

DONT MISS THE FUN 

Regular Rates at new Hotel Casa del Rey 
Special low ticket fares. Ask our Agents 

Southern Pacific 

Flood Building Palace Hotel 

Third & Townsend St. Station. Market St. Ferry Station 
SAN FRANCISCO 
Broadway & Thirteenth Street 
OAKLAND 



MINING AND SCIENTIFIC PRESS 



40 



3f 



Wire Rope 



EXPERIENCE gained by our 55 years of rope 
making enables us to produce wire ropes 
which will successfully withstand even extreme 
conditions. 

Ropes of our PATENT FLATTENED STRAND 
construction are particularly fitted for mine hoist- 
ing and haulage. 

WRITE FOR CATALOG 

A. Leschen & Sons Rope Co. 

ST. LOUIS, MO. 
New York Chicago Denver San Francisco 



$150 




Pierce 
Amalgamators 

made a saving of little more than 
$150 per day in a 60-stamp Colo- 
rado mill during a period of 23 
months. 

Send for 
Catalogue No. 10. 



L. S. PIERCE 

1738 Broadway 

DENVER, 

COLO. 
V. S. A. 



The British Columbia 
Mining and Engineering Record 



PUBLISHED MONTHLY 



gives reliable information concerning the 
new mining fields opening out 
in Northwestern Canada 



Subscription : $2.50 per annum, including postage 



ADDRESS: P. 0. DRAWER 1584, VICTORIA, B. C. 




Mining Filter 
Presses 

WM. R. PERRIN 8 CO. 

CHICAGO, U. S. A. 
TORONTO, CANADA 




Frenier's Spiral Pump 

THE MOST DURABLE FOR 

SLIMES, TAILINGS, BATTERY SANDS, ETC. 

Agents 

Allls-Chalmers Co., Steams-Roger Mfg. 
Chicago, 111. Co., Denver, Colo. 

Harron, Rlckard & McCone, 
San Francisco, Cal. 

FRENIER & SON, Rutland, Vt. 




ROOT w ™r BOILERS 

Metal prices were never 
lower than now. The 
necessity for every 
economy in mining 
was never more im- 
perative. A saving on 
your power cost will 
mean an increase in 
your mine profits. 

Needless to argue the 
superior economy of 
the water tube boiler 
over other types. 
Every engineer ad- 
mits it — and profits 
by it where he can. 

You can realize Water Tube Boiler economy at your 
mine no matter how inaccessible your location — 
by installing the Root Water Tube Boiler. 

For the Root Boiler is the only true Sectional Boiler 
on the market, breaking up into parts suitable 
for pack-animal transport anywhere. 

With the high fuel costs prevalent in most mining 
districts, you must make the greatest possible 
amount of steam per pound of fuel burned. 

With a Root Boiler, you will not only realize the highest 
fuel economy, but you will do so at the lowest cost 
for freight, transportation and erection. I 

ROOT Iv'IAlb PIPE 

ABENDROTH & ROOT 

MANUFACTURING COMPANY 

50 CHURCH STREET, NEW YORK 

CHICAGO. Commercial Nat'l Bank Bldg. MEXICO, Mutual Bldg. 



GoingProspecting? 




Then you need our new booklet, "The 
Prospector's Outfit." Helps the old timer as 
well as the "Tenderfoot" make the trip both 
pleasant and profitable. 

Another folder describes 

WAY'S POCKET SMELTER 

the ore testing outfit that will save time and 
money, and enable you to test any ore " on 
the spot." Satisfaction absolutely guar- 
anteed by a National Bank. 

Your name and address 

on the margin of this ad will bring you both 
booklets. Write NOW. 

WAY'S FOCKET SMELTER CO. 
Box 832, South Pasadena, Cal. 



Send for EreeBooklet 



DIAMOND DRILLS 

Ours Is the most complete line made. 350 to 6000 ft. 
Hydraulic Feed, Screw Feed. Hand Power, Horse Power, 
Gasoline, Steam, Air and Electricity. Sead for Catalosae. 

STANDARD DIAMOND DRILL COMPANY 

745 First National Bank Bdg.. CHICAGO. ILL. 



THE MINING MAGAZINE 

Published Monthly at London, England 
T. A. RICKARD. Editor EDGAR RICKARD. Busfneis Manager 

Subscription Rates: 

United Kingdom 12 shillings per annum 

Canada 83 per annum 

All other countries In the Postal Union 16 shillings or 84 per annum 

Address either Office 

Mining and Scientific Press The Mining Magazine 

420 Market St., San Francisco 819, Salisbury House, London, E.C. 



50 



MINING AND SCIENTIFIC PRESS 



The Consolidated 
Mining and Smelting 
Co. of Canada, ltd. 

Smelters and Retiners. Pur- 
chasers of all classes of Ores. 
Producers of Fine Gold and 
Silver, Base Bullion, Copper 
Matte, Pig Lead, Lead Pipe, 
Bluestone and Electrolytic 
Bearing Metal 

Offices, Smelting and Refining Dept., Trail, British Columbia 



L. Vogelstein & Co. 

42 BROADWAY, NEW YORK 

GENERAL AGENTS 

United States Metals Refining Co. 

Chrome, N. J., and Graselli, Ind. 
ELECTROLYTIC COPPER AND LEAD REFINERS. 



SOLE AGENTS FOR 

SPELTER OF AMERICAN ZINC LEAD & SMELTING CO. 

Smelters at Caney, Kan., and Dearing, Kan. 



WILDBERQ BROS. 

Smelters, Refiners and Purchasers of 

GOLD and SILVER ORES, GOLD DUST, BULLION 
and NATIVE PLATINUM 

Producers ol Proof Gold and Silver lor Assayers 
OFFICE 416-419 PACIFIC BLDG. SAN FRANCISCO. 



Pennsylvania Smelting Co. 

Office : Pittsburg, Pa. Works, Carnegie, Pa. 

Purchasers of 
Lead, Gold and Silver Ores, Lead Bullion. 

INDEPENDENT SMELTERS 



ARE YOU INTERESTED IN 

Legislation Pending in Congress ? 
Financial Reports Filed in the Government Bureaus? 
Securing Contracts for Government Supplies ? 
Interstate Commerce Information ? 
Mining or Land Claims ? 

IF SO, Write today for full particulars 
as to how we can help you. 

NATIONAL SERVICE BUREAU, Inc. 



Colorado Building, 



Washington, D. C. 



SELBY SMELTING & LEAD CO. 

SMELTERS AND REFINERS 

BUYERS OF 

Gold, Silver and Lead Ores, Concentrates, Cyanide 
Product, etc., Lead Bullion, Dore Bars, Gold Dust 
and Bullion. 

CONSIGN ALL SHIPMENTS TO SELBY, CAL. 

Assaying of hand samples has been discontinued. 

GENERAL OFFICES: 

MERCHANTS EXCHANGE BUG., SAN FRANCISCO. 

EIGHTH FLOOR 



International Smelting & 
Refining Company 

NEW YORK OFFICE, 42 BROADWAY 
Purchasers of 

Gold, Silver, Copper 
and Lead Ores 

SMELTING WORKS — International, Utah 

ORE PURCHASING DEPARTMENT 
521-5 K earns Bdg., Salt Lake City 

REFINERY 

RARITAN COPPER WORKS, Perth Amboy, N. J. 



ATKINS, KROLL & CO., Import Merchants, San Francisco 

Flint Pebbles and Sllex Lining. Silica. Firebricks. Magnesite Firebricks. 
Calcined Magneslte, Pea-Size and Fine Ground. Quicksilver. Cyanide. Zinc Dust 
Sorts and Carbons for Diamond Drills. 



Buyers ol Ores and Hare Minerals. 

Special Requirements— Antimony, Bismuth, Blatlnum, 
Tungsten, Molybdenum, Vanadium. 

ATKINS, KROLL & CO., Mineral Dealers, San Francisco 



BEER, SONDHEIMER & CO. 

FRANKFORT-ON-MAIN, GERMANY. 

BtiyGrS Of ZinC OreS Carbonates, Sulphides and Mixed 

— Ores, Copper Ores, Copper Matte, 

Copper Bullion, Lead Bullion, Lead Ores, Antimony Orel. Iron 
and Manganese Ores. 

Sellers °' Spelter, Antimony, Antimonial Lead, Arsenic, 
Zinc Dust. 

Own Smelting and Refining Works. New York Otflce, 42 Broadway 



The American Metal Company, Ltd. 

52 BROADWAY, NEW YORK 

Branch Offices: 



St. I^ouls, Mo. 
1411 Third National Building 

Ores and Mattes 



Denver, Colo. 
825 A. C. Foster Building 

Copper and Lead Bullion 



Mexican Representatives: Companla de Mlnerales y Metales, 
Mexico City and Monterrey. 



ATTRACTIVE TERMS OFFERED FOR 

Gold S iliciou s Ores 

THE MOUNTAIN COPPER CO., Ltd. 

150 PINE ST., SAN FRANCISCO, CAL. 



MINING AND SCIENTIFIC PRESS 



51 



United States Smelting, 

Refining and Mining Co. 

55 Congress St., Boston, Mass. 

NEBDI.ES mining and smelting company 

Custom Lead and Copper Smelters and Custom 
Lead and Zinc Concentrator at Needles, Cal. Ad- 
dress Needles, Cal., and 908 W. P. Storey Building, 
Los Angeles, Cal. 

MAMMOTH COPPER MINING COMPANY 

Custom Copper Smelter at Kennett. Cal. Address, 
Kennett, Cal. 

UNITED STATES SMELTING COMPANY 

Custom Lead and Copper Smelters at Midvale, Utah. 
Address, Salt Lake City, Utah. 

GOLD ROAD MINES COMPANY 

Custom Cyanide Mill at Gold Road, Arizona. 

UNITED STATES METAL REFINING COMPANY 

Custom Copper Smelter and Electrolytic Copper 
Refinery at Chrome, N. J. Electrolytic Lead Re- 
finery at Grasselli, Ind. Address, 42 Broadway, 
New York City, N. Y. 

CIA. DE REAL DEL MONTE 

Mines and Mills at Pachuca and Real del Monte. 
Address, Pachuca, Hidalgo, Mexico. 

UNITED STATES S. R. & M. EXPLORATION COMPANY 

Address, 42 Broadway, New York; 411 Mutual 
Building. Mexico. D. F. ; 1303 Hoge Building, Seattle, 
Wash.; W. P. Story Building, Los Angeles, Cal.; 
Newhouse Building, Salt Lake City, Utah. 

INTERNATIONAL METALS SELLING COMPANY 
42 Broadway, New York City, N. Y. 

Buyer* of 

ORES, MATTE AND FURNACE PRODUCTS 

Refiner* of 

BLISTER COPPER AND LEAD BULLION 




CARS 

for Mines, Smelters, etc. 
Electric Mining Locomotives, 
Electric Cars 
Switches. Frogs, and Equipment. 

THE ATLAS CAR 6 MFG. CO. 

CLEVELAND, OHIO 



^SEND FOR CATALOGUE OF,^ 

SCRUSHER 

•FARREL, FOUNDRY AND MACHINE COMPANY- 

EARLE C.BACON engineer M ^|5?^«j^ 




KEYSTONE CABLE DRILLS 

are used for Copper and Zinc Prospecting, 
Placer Gold Testing, Heavy Blast Hole Drill- 
ing, Artesian Water, Oil and Gas Wells. Many 
sizes, all depths to 2600 ft. Traction and Non- 
Traction. Steam and Gasoline Engine Driven. 
Catalogs No. 1, No. 2, No. 2-B, No. 3, No. 4 No. 7. 
Catalog No. 2— Prospecting Machinery. 

Downie Double Stroke Deep Well Pumps 

steam or power driven, are designed for heavy 
service In deep Artesian Wells. Single Stroke 
pumps for lighter deep well work. Catalog No. 6. 

KEYSTONE PLACER DRILL CO. 

Beaver Falls, Pa. 

170 Broadway, New York. 
Monadnock Blk., Chicago. Carthage, Mo. 

AGENCIES : 

San Francisco: Harron, Rlckard & McCone. 
Seattle : Caldwell Bros. Co. 




Osborn's Prospector's Field-Book and Guide 

Eighth Edition. Revised, Enlarged and up to date. 
Recently Published. 

The Prospector's Field-Book and Guide in the Search for 
and the Easy Determination of Ores and Other Useful Min- 
erals. By Prof. H. S. Osborn. LL.D. Eighth edition, 66 en- 
gravings, 401 pages, 12mo. 

Price $1.50 by mail, postpaid. 



Erni & Brown Mineralogy Simplified 

Easy Methods of Identifying Minerals, including Ores, 
by means of the Blowpipe, by Flame Reactions, Dy Humid 
Chemical Analysis, and by Physical Tests. By Henri Erni, 
A.M. Fourth edition, revised, rearranged, and with the ad- 
dition of _ entirely new matter by Amos P. Brown, A.M., 
Ph.D., Professor of Geology and Mineralogy in the Uni- 
versity of Pennsylvania. 123 engravings, 444 pages, 12mo, 
full leather, gilt edges. 

Price $2.50 net, postpaid. 

Illustrated circulars showing full table of contents of 
either of these books, with specimens of the engravings, 
sent on application. 

HENRY CAREY BAIRD & CO. 

Industrial Publishers, Booksellers and Importers, 
810 Walnut St.. Philadelphia, Pa., V. s. A. 



FLORY HOISTS 

STEAM AND ELECTRIC 




Are adapted for all 
kinds of work. Made 
in all sizes. For Mines, 
Contractors, Quarries, 
Dredging, Cableways, 
Slate Machinery. 



S. FLORY MANUFACTURING CO 

BANGOR, PA. 

SAI ES AGENT 

A. L. YOUNG MACHINERY CO. San Francisco, Cal. 



Gars for every purpos 
known lo the business 



of minincr 



First 

Class MaferiaT 
Gareful design 
by competent 
Garmen . A 
Well equ- 

stf^' The Watt 
&h >^MMng Car-Wheel Co: 

Barnesville , Ohio., U. S. 




In- 
telligent 
American 
mechanics 
who have 
been with 
us a life 
time 



Denver : 
Lindrooth, Shubart & Co. 



San Francisco : 
N. D. Phelps, Sheldon Bldg. 



LIMA LOCOMOTIVES 




With all propositions we furnish a detailed specification giving 
all important dimensions. Particular attention is given to 
locomotives working under unusual or severe conditions. 
Send for Catalog 

THE LIMA LOCOMOTIVE & MACHINE CO. 

Ill W. Second St., LIMA, O. 

50 Church St , New York 1122-3 McCormlck Bldg., Chicago 



52 



MINING AND SCIENTIFIC PRESS 



Steel Tanks and Plate Work 




Oil Agitators and Acid Tanks 

COMPLETE OIL REFINERIES 
LARGE FIELD TANKS A SPECIALTY 

1,000 to 20,000 gallon Station Tanks in Stock for Immediate 
Shipment 

BELL SHAPED 
DISCHARGE 
ENDS FOR 
PENSTOCK 
AND PIPE 
LINES 

The Bartlett-Graver Water Softener has no Equal 

Wm. Graver Tank Works 

EAST CHICAGO, Ind. 

DENVER SALT LAKE CITY LOS ANGELES 

J7J8 California St. 523 Newhouse Bldg. 312 Security Bldg. 





ornccs and warcrooms 

Oonvor, New York, El Paso, Salt Lake City, San Francisco* 
Johannesburg, So. Afrtce, Melbourne, AustralU 

WORK* 

DENVER. COLORADO. U. S. A. 



BUYERS' DIRECTORY 

( — ) Indicates Every Other Week or Monthly Advertisement 

INDEX TO ADVERTISERS, PAGE 59 



Aerial Carrier Page. 

Ruggles Machine Co. . : 32 

MMDonald, Bernard 5 

Traylor Eng. A Mfg. Co 25 

A in li lull in n 1 1 ii - 

L. S. Pierce 49 

Amalgamated Plates 

San Francisco Plating Works 61 

Assurers' and Chemists' Di- 
rectory 
Seepage 22 

Assayers' nn«i Chemists' sup- 
plies 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

Balances and Wrights 

Ainsworth & Sons. Wm H 

Brann Corporation, The 23 

Braun-Kneiht-Heimann Co 23 

Denver Fire Clay Co 47 

Kohlbusch. Herman Sr 56 

Mine & Smelter Supply Co 56 

Salt Lake Hardware Co 56 

Thompson Balance Co 56 

Troemner. Henry 56 

Bull Mills 

Allis-Chalmers Co 17 

Hardinge Conical Mill Co 35 

Hull Mill Plate* 

Chrome Steel Works 57 

Taylor Iron A Steel Co 59 

Bearing* 

Hyatt Roller Bearing Co 42 

Meese A Gottfried Co Back Cover 

Belting; 

Diamond Rubber Co., The 31 

Dodge Mfg. Co 19 

Gaudy Belting Co — 

Goodrich Co.. B. F 30 

Goodyear Rubber Co 46 

Gutta 1'ercha A Rubber Mfg. Co.... — 

M .v i iotiirie.1 Co Back I over 

Robins Conveying Belt Co 89 

Stephens- A damson Mfg. Co. 39 

Webster Mfg. Co — 

licit Luring 

Bristol Co.. The 4 

Bella, Conveyor 

Bartlett A Snow Co.. C.0 39 

Diamond Rubber Co.. The 81 

Dodge Mfg Co 19 

(randy BeltingCo — 

Goodrich Co.. B, F 30 

Goodyear Rubber Co 46 

Gutta 1'ercha A Rubber Mfg. Co.. . . — 

Meese A: Gottfried Co Hack Cover 

Robins Conveying Belt Co :!9 

Stephens-Adamson Mfg. Co 39 

Webster Mfg. Co — 

Blowers 

Allis-Chalmers Co 17 

General Electric Co — 

Hendrle A Bolthoff Mfg. A Sup. Co. 2 

Booka 

Bated A Co.. Henry Carey 51 

Mining and ScLntifie Frsss 48 45 
Wiley .'. Sons. John 53 

Hollers 

Abendroth A Root Mfg. Co 48 

Allis-Chalmers Co 17 

Demarest Co., D. D 58 

Denver Rock Drill A Machinery Co. 52 
Harrou, RickardA McCone BackCover 
Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks. Joshua 42 

Llewellyn Iron Works — 

McMaster, D.J f 1 

Power A Mining Machinery Co 16 

Union Iron Works Co 37 

Brick. Fire 

Atkins. Kroll A Co 50 

Bratin Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

Bridge* 

American Bridge Co 62 

Bom heads 

Chrome Steel Works 57 

Brtquettlns; Machinery 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 28 

Backets 

Allis-Crmlmers Co 17 

Broderick A Bascom Rope Co- 63 



Page. 

Brown Hoisting Machinery Co 4T 

Dodge Mfg. Co 19- 

Harron. Rickard A McCone BackCover 

Hayward Co.. The 33 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks. .Joshua 42" 

Leschen A Sons Rope Co., A 49- 

Meese A Gottfried Co Back Cover 

Robins Conveying Belt Co 39 

Stephens-Adamson Mfg. Co 39- 

Watt Mining Car Wheel Co 51 

Wellman-Seaver-Morgan Co 34 

Burners, oil 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 2S 

Denver Fire Clay Co 47 

Harron. RickardA McCone Back Cover 
Union Iron Works Co 37 

I 'll hi c v* a y s , Suspension 

Broderick A Bascom Rope Co 63 

Flory Mfg. Co., 8 51 

Leschen A Sons Rope Co.. A 19 

Macomber A Whyte Rope Co 43 

Trenton Iron Co 43 

Vulcan Iron Works — 

Cages 

Chalmers A Williams — 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks.. Joshua 42 

Union Iron Works Co 37 

Wellman-Seaver-Morgan Co 81 

CnrbonH, Boris, and Diamonds 

Atkins-Kroll A Co 50 

Cars 

Allis-Chalmers Co 17 

Atlas Car A Mfg. Co 51 

Bartlett A Snow Co.. CO 39 

Demarest Co.. D. D 48 

Harron. RickardA McCone Back Cover 
Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Works. Joshua 42 

Pacific Foundry Co 48 

Stephens-Adamson Mfg. Co 39 

Traylor Eng. A Mfg. Co 25 

Watt Mining Car Wheel Co 51 

Wellman-Seaver-Morgan Co 31 

Casting" 

Abendroth A Root Mfg. Co 49 

Allen American Manganese Steel 

Co.. Edgar ~ 

American Bridge Co 6^ 

Chester Steel Castings Co 59 

Chrome steel Works 57 

Lunkenheimer Co / 4 * 

Pnciric Foundry Co 4 s 

Tuylor Iron A Steel Co 59- 

Van Winkle. H.L «9 

Chain 

Bartlett A Snow Co.. CO •» 

Dodge Mfg. Co UZZ-'Ki 19 

Harron, RickardA McCone Back Cover 

Meese A Gottfried Co Back Cover 

Kuliins Conveying Belt Co ■ '» 

Stephens-Adamson Mfg. Co 39 

Taylor Iron A Steel Co 59 

Wel,<terMfg. Co _ 

Chemicals 

Atkins. KrollACo j>0 

Braun Corporation, The 2a 

Braun-Knecht-Heimann Co 2? 

Denver Fire Clay Co • • • • • 47 

Roessler A Hasslacher Chemical Co. 56 

Chemists 

See page tt 

ChUean Mills 

Allis-Chalmers Co 17 

Chalmers A Williams — 

Lane Mill A Machinery Co 39 

Power A Mining Machinery Co 46 

Traylor Eng. A Mfg. Co 25 

Classifiers 

Allis-Chalmers Co 17 

Chalmers A Williams — 

Dorr Cyanide Machinery Co 28 

Power A Mining Machinery Co 46 

Clutches, Friction 

Dodge Mfg. Co 1» 

Harron. Ricka'd A McCone Back Cover 

Meese A Gottfried Co Back Cover 

Stephens-Adamson Mfg. Co 39 

Wellman-Seaver-Morgan Co 31 

Coal Cutler* 

Allis-Chalmers Co 17 

Goodman Mfg. Co 4 

Ingersoll-Rand Co 13 

McKieman-Terry Drill Co 47 

Power A Mining Machinery Co 46 

Sullivan Machinery Co i5 

Compressors, Air 

Allis-Chalmers Co 17 

American Well Works 41 

Chalmers A Williams — 

Demarest Co.. D. D 48 



MINING AND SCIENTIFIC PRESS 



5:5 



Page. 

Denver Rock Drill & Machinery Co. 52 

General Electric Co 21 

Harron, Rickard & McCone Back Cover 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Wks., Joshua 42 

Ingersoll-Rand Co 13 

Laidlaw-Dunn-Gordon Co 27 

McKiernan-Terry Drill Co 47 

Sullivan Machinery Co 35 

Traylor Eng. & Mfg. Co 25 

Union Iron Work9 Co 37 

Concentrator Belts 

Diamond Rubber Co 31 

Goodyear Rubber Co 46 

Gutta Percha & Rubber Mfg. Co.. . . — 

Concentrators 

Allis-Chalmers Co 17 

Chalmers & Williams — 

Deister Concentrator Co 3 

Deister Machine Co Front Cover 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Works, Joshua 42 

Llewellyn Iron Works — 

Power & Mining Machinery Co 4fi 

Sutton. Steele & Steele, Inc- 47 

Traylor Eng. & Mfg. Co 25 

Union Iron Works Co 37 

Concrete Mixers 

Harron , Rickard & McCone Back Cover 
Power & Mining Machinery Co 46 

Condensers 

Allis-Chalmers Co 17 

Cameron Steam Pump Works, A. S. 55 

Power Specialty Co -1 

Prescott Steam Pump Co.. Fred. M. 41 

Conveyors, Belt 

Allis-Chalmers Co 17 

Bartlett & Snow Co., CO 39 

Dodge Mfg. Co 19 

Meese & Gottfried Co Back Cover 

Robins Conveying Belt Co 39 

8tephen8-Adamson Mfg. Co 39 

Traylor Eng. & Mfg. Co 25 

Webster Mfg. Co — 

Conveyors, Screw 

Dodge Mfg. Co 19 

Meese & Gottfried Co Back Cover 

Stephens-Adamson Mfg. Co 39 

Taylor Iron & Steel Co 59 

Webster Mfg. Co — 

Coolers, Air 

Power Specialty Co 4 

Converters 

Allis-Chalmers Co 17 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Pacific Foundry Co 48 

Power & Mining Machinery Co 46 

Union Iron Works Co 37 

Cornish Pumps 

Demarest Co., D. D 48 

Cranes 

Brown Hoisting Machinery Co 47 

Hayward Co 33 

Wellman-Seaver-Morgan Co 44 

Crucibles 

Braun Corporation, The 23 

Braun-Knecht^Heimann Co 23 

Denver Fire Clay Co 47 

Dixon Crucible Co., Joseph 4 

Crushers 

Allis-Chalmers Co 17 

Bacon, Earle C 51 

Bartlett & Snow Co., CO 39 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Chalmers & Williams — 

Denver Fire Clay Co 47 

Denver Quartz Mill and Crusher Co. 61 
Harron, Rickard itMcCone Back Cover 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Works, Joshua 42 

McMaster, D. J 61 

Power & Mining Machinery Co 46 

8. H. Supply & Machinery Co 61 

Straub & Co 61 

Traylor Eng. & Mfg. Co 25 

Union Iron Works Co 37 

Cupels 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

Cyanide Plants and Machinery 

Abendroth & Root Mtg. Co 49 

Allis-Chalmers Co 17 

BlaisdellCo 61 

Butters Patent Vacuum Filter Co . . 15 

Chalmers & Williams — 

Demarest Co., D. D 48 

Dorr Cyanide Machinery Co 28 

Graver Tanks Works. William 52 

Hammond Iron Works — 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Works. Joshua 42 

Llewellyn Iron Works — 

Meese & Gottfried Co Back Cover 

Moore Filter Co 11 

Oliver Continuous Filter Co 44 

Pacific Tank & Pipe Co 62 

Perrin & Co., Wm. R 49 

Power & Mining Machinery Co 16 

Redwood Mfrs. Co 23 

Traylor Eng. & Mfg. Co 25 



Page. 

Deviaterers 

BlaisdellCo 61 

Dorr Cyanide Machinery Co 28 

Dipper Teeth (Panama) 

Taylor Iron & Steel Co 59 

Distributers 

BlaisdellCo 61 

Drafting Materials 

Alnsworth & Sons, William 56 

Buff & Buff Mfg. Co 56 

Lietz Co.. A., The 56 

Dredges 

Bucyrus Company 61 

Marion Steam Shovel Co — 

New York Engineering Co 28 

Steams-Roger Mfg. Co 4 

Union Construction Co 29 

Union Iron Works Co 37 

Yuba Construction Co 9 

Dredging Machinery 

Abendroth & Root Mfg. Co 49 

Allen American Manganese Steel 

Co., Edgar — 

American Locomotive Co 26 

Bucyrus Company 61 

Hayward Co., The 33 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Marion Steam Shovel Co — 

New York Engineering Co 29 

Robins Conveying Belt Co S9 

Steams-Roger Mfg. Co 4 

Taylor Iron & Steel Co 59 

Dnion Construction Co 29 

Union Iron Works Co 37 

Wellman-Seaver-Morgan Co 34 

Yuba Construction Co 9 

Driers 

Bartlett & Snow Co.. C. 39 

Drill Makers and Sharpeners 

Ingersoll-Rand Co Front Cover 

Drills, Air and Steam 

Chicago Pneumatic Tool Co 53 

Demarest Co., D. D 48 

Denver Rock Drill & Machinery Co. 52 
Harron, Rickard&McConeBack Cover 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Ingersoll-Rand Co 13 

McKiernan-Terry Drill Co 47 

McMaster, D. J 61 

Sullivan Machinery Co 35 

Traylor Eng. & Mfg. Co 25 

Wood Drill Works 38 

Drills, Core 

Ingersoll-Rand Co 13 

Manhattan Drilling Co 46 

McKiernan-Terry Drill Co 47 

Standard Diamond Drill Co 49 

Sullivan Machinery Co 35 

Drills, Electric 

Fort Wayne E'ectric Works 45 

Harron. Rickard&McConeBack Cover 
Ingersoll-Rand Co 13 

Drills, Prospecting 

American Well Works 41 

Harron. Rickard&McConeBack Cover 

Ingersoll-Rand Co 13 

Keystone Placer Drill Co 51 

Manhattan Drilling Co 46 

McKiernan-Terry Drill Co 47 

New York Engineering Co 28 

Shairp, M. A 60 

Star Drilling Machine Co 28 

Standard Diamond Drill Co 49 

Sullivan Machinery Co 35 

Dynamite 

DuPontdeNemours PowderCo., E.I. 44 
Dynamos 

Allis-Chalmers Co 17 

Fort Wayne Electric Works 45 

General Electric Co 21 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 
Westinghouse Electric & Mfg. Co... 33 
Engineers and Metallurgists 
See pages 6, 8, 10, 12, U, 16, IS, 20 
Engines, Gas and Gasoline 

Allis-Chalmers Co 17 

Denver Rock Drill & Machinery Co. 52 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Wks., Joshua 42 

Power & Mining Machinery Co 46 

Westinghouse Machine Co — 

Engines, Steam 

Allis-Chalmers Co 17 

Denver Rock Drill & Machinery Co. 52 
Harron, Rickard&McConeBack Cover 

Hendy Iron Wks., Joshua 42 

McMaster, D. J 61 

Traylor Eng. & Mfg. Co 25 

Union Iron Works 37 

Wellman-Seaver-Morgan Co 34 

Excavators 

Blaisdell Co '. 61 

Brown Hoisting Machinery Co 47 

Hayward Co., The 33 

Fans, Ventilating 

Allis-Chalmers Co 17 

General Electric Co 21 

Harron, Rickard&McConeBack Cover 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 
Sullivan Machinery Co 35 



Continued on Next -Page 



35% Rock Drill Supremacy 




35% Saving in Maintenance 

Bf»r*cinc<= k • ^ e Chicago Giant is better built. 
CLdLibC . Special metals for particular parts. 

Better workmanship, better design. 

Bpp^.^p . the Chicago Giant has simplified 
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positive rotation, adjustable guides. 
The Chicago Giant makes a 35% sav- 
ing in first cost. 

Prove this by getting our prices. 

Chicago Pneumatic Tool Co. 



CHICAGO 



San Francisco Representative : 

N. E. OTTERSON, 71 First St. 



NEW YORK 



RICHARD 8— Synopsis of Mineral Charac- 
ters. Alphabetically Arranged for Lab- 
oratory and Field Use. 12mo, v -f 99 
pages. Morocco $1.25 net 

SECOND EDITION 

BUTLER — A Pocket Handbook of Minerals. 

Designed for Use in the Field or Class- 
Room with Little Reference to Chemical 
Tests. 16mo, ix -\- 311 pages, 89 figures. 
Morocco $3.00 



HAYES— Handbook for Field Geologists. 

Second Edition, Thoroughly Revised. 

16mo, ix -f- 159 pages, 18 figures. 

Morocco $1-50 net 



SECOND EDITION, REVISED 

MERRILL — The Non-Metallic Minerals: Their 
Occurrence and Uses. 8vo, xii -f»132 
pages, 55 figures, 38 full-page plates. 
Cloth $4.00 



JOHN WILEY & SONS 

43 and 45 East 19th Street 
NEW YORK CITY 

London: CHAPMAN & HALL, Ltd. 
Montreal, Canada: RENOUF PUBLISHING CO. 



54 



MINING AND SCIENTIFIC PRESS 




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Double crimping prevents spread- 
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Bkanch Offices: 



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AGENCIES: 
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Page. 

Filter Presses 

Perrin A Co., Wm. R 49 

Traylor Eng. A Mfg. Co 25 

Filters 

Blaisdell Co.. The 61 

Butters Patent Vacuum Kilter Co.. 15 

Chalmers A Williams — 

Moore Filter Co 11 

Oliver Continuous Filter Co 14 

Flanges 

American Spiral Pipe Works 3 

Lunkenheimer Co 41 

Foundry Hflulpment 

Ingersoll-Rand Co IS 

Pacific Foundry Co 18 

Sullivan Machinery Co 85 

Wellman-Seaver-Morgan Co 31 

FroKs and s>\ Itches 

lohns-Manville Co.. B. W 36 

Watt Mining Car Wheel Co 51 

Furnaces, Assny 

Braun Corporation. The 28 

Braun-Knecht-Hcimann Co 23 

Denver Fire Clay Co 47 

Furnaces, KonstiiiK 

Allis-Chalmers Co 17 

Hendrie .V Bolthoff Mfg. A Sup. Co. 2 

Pacific Foundry Co 48 

Power & Mining Machinery Co 16 

Steams- Rogers Mfg. Co 38 

Wedge Mechanical Furnace Co 7 

PurnaceSj smelting; 

Allis-Chalmers Co 17 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Pacific Foundry Co 4x 

Power it Mining Machinery Co 46 

Traylor Kng. A Mfg. Co 25 

Wedge Mechanical Furnace Co 7 

tins Producer* 

Power A Mining Machinery Co 46 

Wellman-Seaver-Morgan Co 34 

Gaaketa 

American Spiral Pipe Works 3 

Diamond Rubber Co 31 

Johns-Manville Co., H. W 36 

Gears 

Dodge Mfg. Co 19 

General Electric Co 21 

Meese A Gottfried Co Back Cover 

Stephens-Adamson Mfg. Co 39 

Generators 

Allis-Chalmers Co 17 

Fort Wayne Electric Works 45 

General Electric Co 21 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 
Westinghouse Electric A Mfg. Co.. 33 

Giants, Hydraulic 

See Hydraulic Mining Machinery 

Hoists, Electric 

Allis-Chalmers Co 17 

Brown Hoisting Machinery Co 47 

Demarest Co. D. D 48 

Denver Rock Drill A Machinery Co. 52 

Flory Mfg. Co., S 51 

General Electric Co 21 

Harron. KicknrdA MeCone Back Cover 
Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hfiidv Iron Works, Joshua 42 

McMaster. D. J 61 

Power it Mining Machinery Co 46 

Sullivan Machinery Co 35 

Union Iron Works Co 37 

Vulcan Iron Works 46 

Wellman-Seaver-Morgan Co 34 

Westinghouse Electric A Mfg. Co.. 33 

Hoist*. Steam 

Allis-Chalmers Co 17 

Brown Hoisting Machinery Co 17 

Demarest Co.. D. D 48 

Denver Rock Drill A Machinery Co. 52 , 

Flory Mfg. Co., S 51 

Harron. Rickard AMct one Back Cover 
Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Works. Joshua 42 

Power A Mining Machinery Co 46 

Sullivan Machinery Co 35 

Vulcan Iron Works 46 

Union Iron Works Co 37 

Wellman-Seaver-Morgan Co 31 

Hose 



Diamond RuIiImt Co.. The 81 

Goodrich <;o.. B. F 30 | 

Goodvear Rubber Co 46 

!iutta Percha A Rubber Mfg. Co... — 

Ingersoll-Rand Co IS 

Johns-Manville Co.. H. W 36 

Hydraulic MIuIiik Machinery 

Abendroth A Root Mfg. Co 49 

American Spiral Pipe Works 8 

Hendy Iron Works. Joshua 42 

Hydraulic Supply Mfg. Co 82 

Pelton Water Wheel Co 61 

Union Iron Works Co 37 

Injectors 

Lunkenheimer Co 44 

Powell Co.. William 51 



Page. 

Jaw Plates 

Allen American Manganese Steel 

Co., Edgar — 

Chester Steel Castings Co 59 

Chrome Steel Works 57 

Taylor Iron A Steel Co 59 

Van Winkle. H. L 59 

Laboratory Supplies 

See A stayers' and Chemist*' 

Supplies. 
I.nmps, Arc and Incandescent 

Fort Wayne Electric Works 45 

General Electric Co 21 

Westinghouse Electric A Mfg. Co.. . 33 

Locomotives, Klectrlc 

Atlas Car A Mfg. Co 51 

Baldwin Locomotive Works — 

Demarest Co.. D. D 48 

General Electric Co 21 

Goodman Mfg. Co 4 

Westinghouse Electric A Mfg. Co... S3 

Locomotives. Steam 

American I/Ocomotive Co 26 

Baldwin Locomotive Works, The . — 
Lima Locomotive A Machine Co... 51 
Vulcan Iron Works 46 

I.iihricnnts 

Albany Lubricating Co — 

Cook's Son's. Adam — 

Lnbrleatora 

Albany Lubricating Co ~ 

Cook's Sons, Adam ~ 

Lunkenheimer Co 41 

Powell Co.. Wm 51 

MnKncsite 

Atkins. Kroll & Co at 

Maaraetle Separators 

Steams-Roger Mfg. Co * 

United Iron Works Co ■ 

Matte Tapping Curs 

Pacific Foundry Co 48 

Metal. Hearing 

Phosphor Bronze Smelting Co 61 

Metal Buyers and Dealers 

American Metal Co.. The 50 

Atkins. Kroll A Co M 

Beer, Sondheimer A Co ■ ■ 50 

Consolidated Mining A Smelting 

Co. of Canada. Ltd 50 

International Smelting* Rfg. Co.. 50 

Metals Buying A Rfg. Co 50 

Mountain Copper Co 50 

Pennsylvania Smelting Co 50 

Helby Smelting A Lead Co ■*> 

U. S. Smelting. Rfg. & Mining Co. . 51 

Vogelstein A Co.. L 50 

Wildberg Bros " 

Mills, Hall nnd Pebble 

Allis-Chalmers Co J? 

Hardinge Conical Mill Co 85 

Mills, rhlleaa 

Allis-Chalmers Co •? 

Lane Mill A Miichinery Co 89 

Power A Mining Machinery Co.... 46 
Union Iron Works Co 

Motors 

Allis-Chalmers Co \l 

Fort Wayne Electric Works 45 

General Electric Co ■ •• • 21 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

He»d> Iron Wks .Joshua 42 

S. H. Supplv A Machinery Co 61 

Westinghouse Electric A Mfg. Co... N 

Motor Trucks 

International MotorCo C4 

Oil nnd Grease Cups 

Albany Lubricating Co — 

Cook's Sons. Adam ~ 

Lunkenheimer A Co 44 

Powell A Co.. Wm M 

oil Well supplies 

Diamond Bobber Co 3) 

Broderick A Bascom Rope Co 63 

Harron. Rick»rdAMcConeBack Gov" 

Hendy Iron Wks.. Joshua 42 

Keystone Placer Drill Co W 

Star Drilling Machine Co 28 

Union Iron Works. 87 

Ore Buy en 

See Metal Huyers and Dealers. 

Ore Testing Works 

California Ore Testing Works 28 

Also see page ft 

Packing; 

Diamond Rubber Co 31 

Johns-Manville Co.. H. W 88 

Paper 

Blake. Moffitt A Towne 61 

Pntent Attorneys 

Dewey. Strong A Co 4 

Pebbles 

Atkins. Kroll A Co 50 

Perforated Metals 

Allis-Chalmers Co 17 

California Perforated 8creen Co 56 

Ludlow-Saylor Wire Co 51 



MINING AND SCIENTIFIC PRESS 



55 



Page. 

Phosphor Bronze 

Phosphor Bronze Smelting Co 61 

Pipe, Cast Iron 

Central Foundry Co — 

Pipe Covering 

Johns-Manville Co., H. W 33 

Pipe, Riveted 

Abendroth & Root Mfg. Co 49 

American Spiral Pipe Works 3 

Graver Tank Works, William 52 

Hydraulic Supply & Mfg. Co 32 

Pipe, Wood 

Pacific Tank & Pipe Co PI 

Redwood Manufacturers Co 23 

Pipe Threading Machines 

Merrell Mfg. Co 23 

Ponder, Blasting 
DuPontdeNemours Powder Co., E.I. 41 
Producer, Gas 

Power & Mining Machinery Co 46 

Wellman-Seaver-Morgan Co 34 

Pulleys, Shafting and Hangers 

Demarest Co., D. D 48 

Dodge Mfg. Co 19 

Harron. Rickard AMcCone.Back Cover 

Hendy Iron Wks. .Joshua 42 

Hyatt Roller Bearing Co 42 

Meese & Gottfried Co Back Cover 

Robins Conveying Belt Co 39 

Stephens-A damson Mfg. Co 39 

Wellman-Seaver-Morgan Co 31 

Pulverizers 

Allis-Chalmers Cc 17 

Bartlett & Snow Co.. CO 39 

Braun Corporation. The 23 

Braun-Knecht-Heimann Co 23 

Chalmers & Williams — 

Denver Fire Clay Co 47 

Denver Quartz Mill <Si Crusher Co . . ill 

Hardinge Conical Mill Co 35 

Hendy Iron Works, Joshua 42 

Johnson Engineering Works — 

Power & Mining Machinery Co 46 

Straub Mfg. Co 61 

Wellman-Seaver-Morgan Co il 

Pumps 

Alberger Pump Co 40 

Allis-Chalmers Co 17 

American Well Works 41 

Cameron Steam Pump Works, A. 8. 55 

Deane Steam Pump Co 41 

Demarest Co., D. D 48 

Deming Co., The 51 

Denver Rock Drill & Machinery Co. 52 

Frenier & Son 49 

General Electric Co 21 

Harron, Rickard &McC 'one Back Cover 
Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Wks., Joshua 42 

Jackson Iron Works, Byron 40 

Jeanesville Iron Works Co 10 

Keystone Placer Drill Co 51 

Knight & Co 40 

Krogh Pump Manufacturing Co — 

Llewellyn Iron Works — 

McMaster, D. J 61 

Meese & Gottfried Co Back Cover 

Prescott Steam Pump Co., Fred. M. II 

8. H. Supply & Machinery Co 61 

ITnion Iron Works Co 37 

Yuba Construction Co 9 

Quicksilver 

Atkins, Kroll & Co 50 

Braun-Knecht-Heimann Co 57 

Railway Supplies and Equip- 
ment 

American Locomotive Co 26 

Atlas Car & Mfg. Co 51 

Baldwin Locomotive Wks., The... — 

Carnegie Steel Co 31 

Lima Locomotive & Machine Co.. . 51 
Watt Mining Car Wheel Co 51 

Recording Instruments 

Bristol Co., The 4 

Rings and Dies 
See Jaw Plates. 
Rolls, Crushing 

Allis-Chalmers Co 17 

Bacon, Earle C 51 

Chalmers <fc Williams — 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Hendy Iron Works, Joshua 42 

Lane Mill & Machinery Co 39 

Power & Mining Machinery Co 46 

Taylor Iron & Steel Co 59 

Traylor Eng. & Mfg. Co 25 

Roofing 

Johns-Manville Co.. H. W 36 

Rope, Manila and Jute 

Broderick & Bascom Rope Co 63 

Dodge Mfg. Co 19 

Leschen & Sons Rope Co.. A 49 

Meese & Gottfried Co Back Cover 

Rope, Wire 

Broderick & Bascom Rope Co 63 

Dodge Mfg. Co 19 

Leschen & Sons Rope Co., A 49 

Macomber <& Whyte Rope Co 43 



Page. 

Robins Conveying Belt Co 39 

Roebling's Sons Co., John A 43 

Trenton Iron Co 43 

Vulcan Iron Works — 

Samplers 

Braun Corporation. The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

Saw Mill Machinery 

Hendy Iron Wks.. Joshua 42 

Traylor Eng. & Mfg. Co 25 

Schools and Colleges 

Healds School of Mines 60 

School of Practical Mining 60 

Screens 

Allis-Chalmers Co 17 

California Perforating Screen Co.. . 56 

Chalmers & Williams — 

Ludlow-Saylor Wire Co 54 

Meese & Gottfried Co Back Cover 

Power & Mining Machinery Co 46 

Stephens- Adamson Mfg. Co 39 

Traylor Eng. & Mfg. Co 25 

Second-Hand Machinery 

McMaster. D. J 61 

^. H. Supply & Machinery Co 61 

Weisbaum Pipe Works 61 

Separators 

3tearns-Roger Mfg. Co 4 

United Iron Works Co 61 

Shafting 

See Pulleys, Sha/ting and 
Hangers. 

Sheaves 

Broderick & Bascom Rope Co 6M 

Dodge Mfg. Co 19 

Leschen & Sons Rope Co.. A 39 

Meese & Gottfried Co Back Cover 

Robins Conveying Belt Co 39 

Stephens-Adamson Mfg. Co 39 

Wellman-Seaver-Morgan Co 34 

Shells and Rings 

See Jaw Plates. 
Shoes and Dies 

Chrome Steel Works 57 

Traylor Eng. & Mfg. Co 25 

Union Iron Works Co »7 



Shovels, Electric and Steam 

American Locomotive Co 

Brown Hoisting Machinery Co 

Bucyrus Co, The 

Marion Steam Shovel Co 

Thew Automatic Shovel Co 

Silex 

Atkins. Kroll & Co 

Smelters and Refiners 



Beer. Sondheimer & Co 

Consolidated Smelting & Rfg. Co. 

of Canada. Ltd 

International Smelting & Rfg. Co.. 

Pennsylvania Smelting Co 

Selby Smelting & Lead Co 

U. S. Smelting. Rfg. & Mining Co.. 

Vogelstein & Co.. L 

Smelting Machinery 

Allis-Chalmers Co W 

Hendrie & Bolthoff Mfg. & Sup. Co. 2 

Pacific Foundry Co 48 

Power & Mining Machinery Co 46 

Stearns-Rogers Mfg. Co 38 

Union Iron Works Co 37 

Wedge Mechanical Furnace Co 7 

Smelter, Pocket 

Way's Pocket Smelter Co 49 

Springs 

Cary Spring Works 57 

Stamp Mills 

Allis-Chalmers Co 17 

Chalmers & Williams 

Demarest Co.. D. D 

Hendrie & Bolthoff Mfg. & Sup. Co. 

Hendy Iron Works. Joshua 

Power & Mining Machinery Co — 

Traylor Eng. & Mfg. Co 

Union iron Works Co 

Wellman-Seaver-Morgan Co 

Stamp Stems and Guides 

Chrome Steel Works 

Demarest Co.. D. D 



48 

Steel, Chrome 

Chrome Steel Works 57 

Steel, Drill 

Edgar Allen & Co 59 

Harron, Rickard JiMcCone. Back Cover 

Steel, Manganese 

Allen American Manganese Steel 

Co., Edgar — 

Chester Steel Castings Co 59 

Taylor Iron & Steel Co 59 

Van Winkle, H. L 59 

Steel, Structural 

American Bridge Co 62 

Steel, Tool 

Edgar Allen & Co 59 



THE SLOGAN OF THE CAMERON— 
"CHARACTER: THE GRANDEST THING:' 



Cameron Pumps 



Regular Pattern 




WHAT AMOUNT DO YOU 
PAY FOR PUMP SERVICE 
PER YEAR? 

The price of a pump divided by the num- 
ber of years it gives efficient service — with 
the cost of power and repairs considered — 
gives a true estimate of its value. 

Judged by this value Cameron Pumps are 
found to be the most economical and satis- 
factory you can buy. 

There are excellent reasons for this : Sim- 
plicity of design, superiority of material, 
fewer working parts than any other steam 
pump made ; no outside valve gear, and a 
compact, strong and durable construction. 

All of these qualities are of intensified im- 
portance to the careful buyer of permanent 
pump equipment. If you want to pay the 
lowest price for efficient pump service be 
sure to install the CAMERON. 

Cameron Catalog No. 18 illustrates and describes 
all types of Cameron Pumps. Sent on request to 
interested pump users. 

A. S. Cameron Steam Pump Works 



11 BROADWAY 



NEW YORK 



7-6-12 



Continued on page 57. 



MINING AND SCIENTIFIC PRESS 




TRY IT 
YOURSELF 



We have been giving 
In this space during the 
last six months our 
ideas of the Keller Bal- 
ance- Perhaps they Im- 
pressed and perhaps 
they didn't. At any 
rate, we want you to try 
It yourself. Send for 
one, use it 15 days and If 
it does not give complete 
satisfaction we will take 
it back and refund your 
money. 

Send for Catalogue "C" 



-The KELLER Is BET 1 EH.' 



THE SALT LAKE HARDWARE CO., SALT ftK C,TY 



The Roessler & Hasslacher 
Chemical Company 

100 WILLIAM STREET, NEW YORK 

Works: Perth Amboy, N. J. 

CYANIDE 

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CYANIDE OF SODIUM 

128/130 Per Cent. 
CHEMICALS FOR MINING PURPOSES 





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FOR OVER 60 YEARS. 



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The most popular and effi- 
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List Price, $95.00. Price List on Application. 

HENRY TROEMNER, PHILADELPHIA, PA., U.S. A. 






._ 




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SEND FOR CATALOG 



A-9 of Balances. 



BX-9 of Engineering Instruments. 



WM.AiNSWOR.TH 

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THOMPSON 
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MANUFACTURER OF 

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ENGINEERING INSTRUMENTS 

BUFF & BUFF COMPANY 

m Jamaica Plain Station, - - BOSTON, MASS. 
A. E. FULLER, Seattle, Agent for Northwest. 
Tue "Buff" is the result of 50 years of instrument 
Send lor Catalogue 31. study by our Mr. Geo. L. Buff— our present manager 



Lktz 



ARE FOREMOST WITH THE PROFESSION 
THE fl.LIETZ CO.. SflN FRANC ISCO, CflL. 
ESTABLISHED 1882 




California Perforating 

Screen Company 

Manufacturers of Perforated Sheet Metals of 
all klndB for Mining and MUllng Machinery 
and other uses. 

416 Harrison Street, San Francisco. Cat. 



Interested in Mining? 

Try the country served by the 
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It has other RESOURCES and rich OPPORTUNITIES 

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Let us tell you something of them. 
H. LAWTON, G. P. A., 

"West Coast Route'' Guaymai, Sonora, Mexico 



MINING AND SCIENTIFIC PRESS 



57 



Superheaters Page. 

Power Specialty Co 4 

Tanks, Cyanide 

Abendroth & Root Mfg. Co 49 

Graver Tank Works, William 52 

Hammond Iron Works — 

Llewellyn Iron Works — 

Pacific Tank & Pipe Co 62 

Power & Mining Machinery Co 46 

Redwood Mfrs. Co 23 

Tapes, Measuring 

Lufkin Rule Co 56 

Thickeners, Slime 

Dorr Cyanide Machinery Co 28 

Ties, Steel 

Carnegie Steel Co 34 

Timbers, Mine 

Carnegie Steel Co 34 

Tramways, Aerial 

Broderick & Bascom Rope Co 63 

Leschen & Sons Rope Co., A 49 

Macomber & Whyte Rope Co 43 

Roebling's Sons Co., John A 43 

Ruggles Machine Co 32 

Trenton Iron Co 43 

Vulcan Iron Works — 

Transits 

Alnsworth & Sons, William 56 

Buff & Buff Mfg. Co 56 

Lietz Co. A, The 56 

Transmission Machinery 

Bartlett & Snow Co.. CO 39 

Dodge Mfg. Co 19 

General Electric Co 21 

Harron, Rickard&McOoneBack Cover 

Hendy Iron Wks., Joshua 42 

Meese & Gottfried Co Back Cover 

Robins Conveying Belt Co 39 

Stephens-Adamson Mfg. Co 39 

Taylor Iron & Steel Co 59 

Tube Mills 

Allis-Chalmers Co 17 

Chalmers & Williams — 

Hardinge Conical Mill Co 35 

Power & Mining Machinery Co 45 

Traylor Eng. & Mfg. Co 25 

Dnion Iron Works Co 37 

Turbines, Hydraulic 

Allis-Chalmers Co 17 

Hendy Iron Works, Joshua 42 

Knight* Co 40 

Pelton Water Wheel Co 6! 

Wellman-Seaver-Morgan Co .'II 



Turbines, Steam Page. 

Alberger Pump Co 40 

Allis-Chalmers Co 17 

General Electric Co 21 

Westinghouse Machine Co — 

Valves 

Lunkenheimer Co 44 

Pelton Water Wheel Co 61 

Powell Co.. William 54 

Water Wheels 

Knight & Co 40 

Pelton Water Wheel Co 61 

Union Iron Works Co 37 

Wellman-Seaver-Morgan Co 34 

Waterproof Coating 

Johns-Manville Co.. H. W 36 

Water Softeners 

Dodge Mfg. Co 19 

Graver Tank Wks.. Wm 52 

Weighing Machines 

Electric Weighing Co — 

Merrick Scale Mfg. Co 36 

Well Drilling Machinery and 
Supplies 

American Well Works 41 

Broderick & Bascom Rope Co 63 

Harron, Rickard&McConeBack Cover 

Keystone Placer Drill Co 51 

Manhattan Drilling Co ■. 46 

Star Drilling Mach. Co 28 

Union Iron Works Co 37 

Wheels, Car 

Carnegie Steel Co 31 

Taylor Iron & St*-el Co 59 

Watt Mining Car Wheel Co 51 

Wire Cloth 

LudlowSaylor Wire Co 58 

Wire Cables 

Broderick & Bascom Rope Co 63 

Leschen & Sons Rope Co., A 49 

Macomber & Whyte Rope Co 43 

Roebling's Sons Co.. John A 43 

Trenton Iron Co 43 

Vulcan Iron Works • — 

Zinc Boxes 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

Graver Tank Works, Wm 52 

Hammond Iron Works — 

Llewellyn Iron Works — 

Pacific Tank & Pipe Co 62 

Redwood Manufacturers Co 23 

Union Iron Works Co 37 

Zinc Dust and Shavings 

Atkins, Kroll & Co 50 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23 

Denver Fire Clay Co 47 

RoesslerA Hasslacher Chemical Co. 56 



CARY SPRING WORKS 

240-242 W. 29th St., NEW YORK CITY 

HIGH GRADE SPRINGS 

OF ALL KINDS 
FOR EVERY PURPOSE 

Write for Booklet "M." 




MERCURY 

HEADQUARTERS 

BRAUN-KNECHT-HEIMANN CO. 



676-584 MISSION STREET, 



SAN FRANCISCO 



The Economics of Mining Finance 

By M. H. BURNHAM 

26 Pages —7x10 Inches — Illustrated — 50 Cents (2s.) 

This pamphlet is a reprint of the articles 
which appeared in The Mining Magazine, 
of London, under the title of 'The Finance 
of a Mine.' It is worth preserving and 
should be in every engineer's library. 

FOR SALE BY 

MINING AND SCIENTIFIC PRESS 

420 Market Street, San Francisco 
AND 

The Mining Magazine, 819, Salisbury House, London, E. C. 



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for 
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"ADAMANTINE" Shells and Rings are 
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TRADE 

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REPRESENTED BY 

GEORGE W. MYERS, Kohl Bldg., SAN FRANCISCO, CAL. 
J. F. SPELLMAN, First Nat'l Bank Bldg., DENVER, COLO. 



5S 



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MINING AND SCIENTIFIC PRESS 



59 



ALPHABETICAL INDEX TO ADVERTISERS 

( — ) Indicates Every Other Week or Monthly Advertisement 



Page. 

Abendroth & Root Mfg. Co 49 

AJnsworth & Sons. William 56 

Albany Lubricating Co — 

Alberger Pump Co 40 

Allen & Co.. Edgar 59 

Allen American Manganese Steel 

Co., Edgar — 

Allls-Cnalmers Co 17 

American Bridge Co 62 

American Locomotive Co 26 

American Metal Co., Ltd 50 

American Spiral Pipe Works 3 

American Well Works 41 

American Zinc Ore Separating Co.. 

The 4 

Atkins. Kroll & Co .50 

Atlas Car & Mfg. Co 51 

Bacon, Earle C 51 

Baird & Co., Henry Carey 51 

Baldwin Locomotive Works — 

Bartlett & Snow Co.. C. O 39 

Beer, Sondheimer & Co 50 

Blaisdell Co 61 

Blake, Moffitt & Towne 61 

Braun Corporation, The 23 

Braun-Knecht-Heimann Co 23, 57 

Bristol Co., The 4 

Broderick & Bascom Rope Co 63 

Brown Hoisting Machy. Co 47 

Bucyrus Company 61 

Buff & Buff Mfg. Co 56 

Butters Patent Vacuum Filter Co.. ..15 

California Ore Testing Co 23 

California Per. Screen Co 56 

Cameron Steam Pump Works, A. S..55 

Carnegie Steel Co 34 

Cary Spring Works 57 

Central Foundry Co — 

Chalmers & Williams 4 

Chester Steel Castings Co 59 

Chicago Pneumatic Tool Co 53 

Chrome Steel Works 57 

Consolidated Min. & Smelting Co., 

of Canada, Ltd 50 

Cook's Sons Adam — 

Oeister Concentrator Co 3 

Deister Ma chine Company Front Cover 

Deane Steam Pump Co 41 

Demarest Co., D. D 48 

Doming Co., The 54 

Denver Fire Clay Co 47 

Denver Quartz Mill & Crusher Co. . .61 

Denver & Rio Grande 56 

Denver Rock Drill & Machinery Co. 52 

Dewey, Strong & Co 4, 60 

Diamond Rubber Co., The 81 

Dixon Crucible Co.. Joseph 4 

Dodge Mfg. Co 19 

Dorr Cyanide Machinery Co 28 

Du Pont de Nemours Powder Co., 
E. 1 44 

Electric Weighing Co - 

Flory Mfg. Co., S 51 

Fort Wayne Electric Works 45 

Free & Taylor 61 

Frenier & Son 49 

Sandy Belting Co — 

General Electric Co 21 

Soodman Mfg. Co 4 

Goodrich Co., The B. F 30 

Goodyear Rubber Co 16 

Graver Tank Works, Wm 52 

Gutta Percha & Rubber Mfg. Co — 

Gt. West. Smelting & Ref. Co 61 

Hammond Iron Works 39 

Hardinge Conical Mill Co 35 

Harron, Rickard & McCone 

Back Cover 

Hayward Co 33 

Heald's School of Mines 60 

Hendrie & Bolthoff Mfg. & Sup. Co.. 2 

Hendy Iron Works, Joshua 42 

Hyatt Roller Bearing Co 42 

Hydraulic Supply Mfg. Co 32 

tngersoll-Rand Co 13 

International Motor Co 4 

International S. & R. Co 50 

Jackson Iron Works, Byron 10 

Jeanesville Iron Works 10 

Johnson Engineering Works — 

Johns-Manville Co.. H. W 36 

Keystone Placer Drill Co 51 

Knight & Co 40 



Page. 

Kohlbusch, Herman, Sr 56 

Krogh Pump Co — 

Laidlaw-Dunn-Gordon Co 27 

Lane Mill & Machinery Co 39 

Leschen & Sons Rope Co., A 49 

Lietz Co., A 56 

Lima Locomotive & Machine Co 51 

Llewellyn Iron Works — 

Lodwic Concentrator Co., The 24 

Ludlow-Saylor Wire Co 51 

Lufkin Rule Co 5fi 

Lunkenheimer Co 44 

MacDonald Bernard 5 

Macomber & Whyte Rope Co 43 

Manhattan Drilling Co 46 

Marion Steam Shovel Co — 

McKiernan-Terry Drill Co 47 

McMaster, D. J 61 

Meese& Gottfried Co Back Cover 

Merrell Mfg. Co 23 

Merrick Scale Mfg. Co 36 

Moore Filter Co 11 

Mountain Copper Co 50 

Myers, Geo. W 57 

National Service Bureau, Inc 50 

New York Engineering Co 28 

Oliver Continuous Filter Co 44 

Pacific Foundry Co 48 

Pacific Tank and Pipe Co 62 

Pel ton Water Wheel Co 61 

Pennsylvania Smelting Co 50 

Perrin & Co., Wm. R 49 

Phosphor Bronze Smelt. Co 61 

Pierce, L S 49 

Powell Co., Wm 51 

Power & Mining Machy. Co 16 

Power Specialty Co 4 

Prescott Steam Pump Co., Fred M. . . 11 

Redwood Manufacturers Co 23 

Robins Conveying Belt Co 39 

Roebling's Sons Co., John A 43 

Roessler A Hasslacher Chemical Co. 56 
Ruggles Machine Co 32 

Salt Lake Hardware Co 56 

San Francisco Plating Wks 61 

School of Practical Mining 60 

S. H. Supply & Machy. Co 61 

Selby Smelting & Lead Co 50 

Senn Smith Concentrator Co — 

Shairp, M. A 60 

Southern Pacific Co 49 

Southern Pacific R.R. of Mexico 58,61 

Standard Diamond Drill Co 49 

Star Drilling Machine Co 28 

Stearns-Roger Mfg. Co 4, 38 

Stephens-Adamson Mfg. Co 39 

Straub Mfg. Co 61 

Sullivan Machinery Co 35 

Sutton, Steele & Steele. Inc 47 

Taylor Iron & Steel Co 59 

Thew Automatic Shovel Co 37 

Thompson Balance Co 56 

Traylor Engineering & Mfg Co 25 

Trenton Iron Co 43 

Troemner. Henry 56 

Union Construction Co 29 

Union iron Works Co 37, 59 

United Iron Works Co 61 

U. S. Smelting, Rfg. & Mining Co.... 51 

Van Winkel, H. L 59 

Vogelstein & Co.. L 50 

Vulcan Iron Wks. (S. F.) — 

Vulcan Iron Wks. (Wilkesbarre.) . . .46 



Watt Mining Car Wheel Co 51 

Way's Pocket Smelter Co 49 

Webster Mfg. Co — 

Wedge Mechanical Furnace Co 7 

Weisbaum Pipe Works 61 

Wellman-Seaver-Morgan Co 34 

Westinghouse Electric* Mfg. Co 33 

Westinghouse Mach. Co — 

Wildberg Bros 50 

Wiley & Sons, John 53 

Wood Drill Works 38 

Yuba Construction Co 9 



RISDON JOHNSTON CONCENTRATOR 




The Standard Vanner Concentrator. Always In stock. 
Send for Catalog No. 14. 

UNION IRON WORKS CO. 



Sole Manufacturers. 



San Francisco, California. 



MANGANESE 
STEEL CASTINGS 

Mine Car Wheels — Crusher Parts 

Taylor Iron & Steel Co. 

High Bridge, New Jersey 

San Francisco Office: 203 Mills Building-. 



Steel Castings 

Of every Mad aad description. Made to the United State* 
Government and all recognized specifications. Cementation 
Steel Castings for crank shafts, connecting rods, gear blanks, 
cylinders, etc., and all parts where a maximum ability to re- 
sist wear Is required and also where a high elastic limit U 
desired. 

We solicit your valued orders and guarantee deliveries 

CHESTER STEEL CASTINGS CO., CHESTER, PA. 

H. L. VAN WINKLE, Sole Agent Pacific Coa.l. 160 Beale St., San Francisco 



ALLEN'S STEEL 



IS SHEFFIELD-MADE 
AND THOROUGH t 

High Speed Steel, Best Carbon Tool Steel, Hollow Drill Steel. 
EDGAR ALLEN & CO., Limited, New York — Chicago 

Union Well Supply Co., - - Los Angeles 
Fourcar, Ray & Simon, - - San Francisco 



Stocks carried by • 



ECONOMIC GEOLOGY 

A Semi-Quarterly Journal Devoted to Discussions In 
APPLIED GEOLOGY. 

EDITOR : J. D. IRVING, YALE UNIVERSITY. 

Associate Editors: Messerp Ashley, Lawson, H. V. Winchell, 
Leith, Kemp, Ransome, V". D. Adams, and J. W. Gregory. 

Price: $3.00 a year in the United States, Canada, Cuba, and 

Mexico, or $3.75, including postage, to other countries. 

With new subscriptions to Mining and Scientific Press to 
one address in United States, $4.00. 

Address W. S. BAYLEY, Manager, No. 41 Queen Street, Lan- 
caster, Pa., or University of Illinois, Urbana, 111. 



FOR THE MILLMAN 



PRACTICAL STAMP MILLING 
AND AMALGAMATION 



By H. W. MacFarren 



\66 Pages 



Indexed $2 Postpaid 



Gives details needed in everyday work. The stamp-mill, 
its location, and design; the mortar, die, shoe, tappet, and 
cam; adjustment of height, order of drop, feeder, and screens; 
water supply and power; principles of amalgamation and 
treatment of plates; retorting; loss of gold, mill tests, and 
mill management; all these are treated in an illuminating 
manner by one who has himself solved the problems. 

MINING AND SCIENTIFIC PRESS, 420 Market St., Sah Francisco 

THE M/N/NC MAGAZINE, «19, Salisbury House, London, E. C. 



MINING AND SCIENTIFIC PRITSS 



POSITIONS WANTED 



The cost of advertising /or positions wanted is t cents per word 
per insertion. Minimum order SO cents. Replies forwarded without 
extra charge. Remittance must accompany ordtr. 



CYANIDE -MAX desires position, foreign country preferred; 
technical graduate; 8 vears Mexican experience; familiar with 
most modern practice and machinery; twice in charge success- 
ful plants; interested in the wink and would prefer employment 
under technical mana gement. Address Box i>95. this office. 

M1LLMAX. amalgamator, concentrator, cyanide-man, assayer, 
surveyor, draughtsman, superintendent; graduate University of 
California; 15 years experience, seven Mexico; position desired 
any capacity good company. M. A. KNAPP, 1732 Webster St., 
Oakland, Cal. 

ELECTRICIAN* AND MECHANIC, college educated, 33 years 
old, ten years practical experience erecting and maintaining 
electrical and mining machinery, desires position with mining 
company; have just finished the installation of a large gas 
electric plant in Mexico; references furnished. Address Box 
993, this office. 

POSITION WANTED — By young, sober, experienced assayer 
and surveyor, familiar with cyanide testing; salary and location 
secondary" importance; in position to move quickly. Address 
Box 994. this office. 

WANTED — By an all around diamond drill man, a position 
with a reliable company; can furnish good references; have 
had twelve years experience. Address Box 992, this office. 

MINE MANAGER, accustomed to large organization, details, 
severe conditions, close margins, milling, amalgamation, and 
cyanide; family. Address Box 987, this office. 

ASSAYER AND CHEMIST desires position with reliable com- 
pany; has been employed in some of the biggest smelters and 
cyanide plants as lead chemist and assayer; 38 years of age 
and married; best of references can be furnished. Address. 
Box 989. this office.- 

EXPERIENCED METALLURGIST desires change; has had 
exceptional experience in cyaniding silver ores and concen- 
trates; thoroughly familiar with latest devices and best prac- 
tice in amalgamation, concentration, and cyanidation; have 
made good in operating plants economically and efficiently; 
best references. Address Box 990. this office. 

WANTED — By a practical all-round miner, position as fore- 
man of mine; am capable of handling almost any kind of work 
pertaining to mining; 25 years experience in mining and en- 
gineering; good in hydraulics (not a technical graduate from 
mining school); will go any place, from Alaska to South 
America. Address Miner, 1197 E. Yamhill St.. Portland, Ore. 

MINING ENGINEER, technical education, eight years prac- 
tical experience in Western States, Canada, Mexico, and South 
America, in all capacities from mucker to manager; thorough 
knowledge of underground work, cyaniding and milling; speaks 
Spanish; desires position; testimonials from previous employers 
and engineers of repute. Address Box 957, this office. 

SUPERIXTEXDENT or assistant superintendent, surveyor, 
assayer and cyanide chemist; a technical graduate. Dept. U. S. 
Mineral Surveyor; A-l underground surveyor and map maker; 
6 years experience: salary reasonable. Address Box 944, this 
office. 

POSITIOX DESIRED as superintendent or manager; technical 
graduate with ten years of practical experience in mining gold 
and silver; also copper, lead and zinc; good organizer and ex- 
pert metallurgist; successful with low-grade ores; speaks Span- 
ish; first-class testimonials. Address Box 929. this office. 



NOTICES OF RECENT PATENTS 



FOR SALE 



Five gold quartz claims ; good prospect, plenty of timber; 
three miles from Klamath river and near GottTtlle, SiMklyou 
county, California. For further particulars, address or see 
E. n. WHITMAN, 502 Wells Fargo Bilg.. San Francisco. 



FOR SALE 



New « 11. i\ Atlaa standard Gasoline Engine complete wits 
attachment* for opi-nitine on kerosene, t un he Inspected In 
San Francisco. Will siicrtflre for quick Bale. 

ATI, AS ENGINE WORKS, 

I nd Is nap oils. 



DIAMOND DRILL 
CONTRACTOR 

rVI. A. SHAIRP, Box 522, San Franclco 



1 am prepared to undertakecon- 
tractdrllllng with my own outfit. 
Have hsd 19 years' experience In 
diamond drilling and can refer 
to many mining companies. 



DIVIDEND NOTICE 

THE GF.IOIVN suim.v \M> LOAN SOCIETY 

(The German Bank) 
526 California St. 
Mission Branch, 2572 Mission St., near 22d. 
Richmond District Branch, 601 Clement St.. cor 7th Ave. 
Haight Street Branch, 1456 Ilaight St bet. Masonic 
and Ashbury. 

For the half year ending June 30, 1912. a dividend has 
been declared at the rate of four (4) per cent per annum on 
all deposits, free of taxes, payable on and after Monday, 
July 1, 1912. Dividends not called for are added to the de- 
posit account and earn dividends from July 1, 1912. 

GEORGE TurilXY. Manager. 



One Dollar 
postpaid 

Published and For Sale by MINING AND SCIENTIFIC PRESS 



Austin's Fire Assay 



Among the patents recently obtained through Dewey, Stro&a 
& Co.'s Scientific Press United States and Foreign Patent 
Agency, the following are worthy of special mention: 

DENTAL CROWN AND BACKIXG. — Robert E. Campbell, 
Berkeley, Cal. It is the object of this invention to provide a 
backing for a dental crown which is so designed and constructed 
as to form a substantial and rigid support for a porcelain crown, 
or the like, and which is so arranged that the crown may be 
easily and quickly mounted thereon. 

AMI'SEMENT APPARATUS — Douglass H. Cleghorn, Oakland, 
Cal. This invention relates to a new amusement apparatus, the 
object of which is to create a new sensation by carrying pas- 
sengers in carriages on a circular track which has sudden dips 

and rises. 



RAILWAY-RAIL CHAIR.— John W. Swales, Fruitvale, Cal. 
The object of this invention is to provide a means for securely 
holding railway rails in place upon the ties or sleepers upon 
which they are carried. 



REVERSIBLE HYDRAULIC CLUTCH. — Peter English, San 
Francisco. Cal. It is the object of this invention to provide a 
means for transmitting motion from a driving shaft to the shaft 
to be driven, which will permit of the speed of the driven shaft 
being varied to any desired extent. 



CURTAIN AND LIKE DISPLAY DEVICE.— Ferdinand Frank, 
San Francisco, Cal. This invention relates to an apparatus for 
displaying curtains and light goods which are usually carried 
in rolls or sheets, and which must be unrolled and exposed for 

display purposes. 



CANE-CUTTER.— Elmer E. Paxton, Honolulu. Hawaii. It is 
the object of this invention to provide an apparatus which Is 
especially designed for cutting sugar cane or like stalks which 
it is desirable to sever closely to the ground. 

SCHOOLS AND COLLEGES 



'1st ard Telegraph Arenac 
Oakland Cal. 



SCHOOL OF PRACTICAL MINING 

CIVIL, MECHANICAL AM) KI.F.t THICAl ENGINEERING. 

Surveying, Architecture, Drawing. Assaying, Cyanide Pro- 
cess and Metallurgy. Assaying of Ores, $35; Blowpipe Assay, 
flu. Full course of Assaying, $60. Send for Circular. Open 
all year. Est. 1864. A. VAN DER \ AIl.I.EV President. 



A. VANDER NAILLEN, Jr., C.E., M. E. 

For quarter of a centurv mangr. of the V at*i>er N a ili.en School, 
Is now associated with the HE AID'S SCHOOL OF MINES. 136 McAllister St., 
S. F. Thorouuh practic al courses In Mining, Assaying. Metallurgy, 
Civil, F.Iee'l, Struct ! Kng , Survev, Archi., etc Assay and Cyanide 
Course complete, 14 wks., 8125. Assay Gold and silver, 2 wks. $35. 
.1 ust moved in new huildg. Immense Laboratory Practical Instruct- 
ors Individual Instruction only. LARGEST SCHOOL in the West. Open 
all yr. Estab. 1863. Cat*, free. 



HENRY B. LISTER, 

Attorney at I. aw 

Notary Public and Commissioner of Deeds for New York. 
805 Pacific Bdg., Fourth and Market Streets. San Francisco. 



TO MINIM, ENGINEERS 

An assayer. owning and at present operating a custom 
assay office, wishes to get into communication with an estab- 
lished engineer or firm of engineers whose practice would be 
expedited or Increased by the installation Of an assay office 
in conjunction with same, and to whom the services of an 
experienced assayer and mine sampler would be valuable. 
Address Box 988. this office. 



MINE BELL SIGNALS 



PRINTED I 
OILCLOTH 



h n 50c. per copy. 

Postage prepaid by the 
MINING AND SCIENTIFIC PRESS. 



C. S. BURTON & CO. 

15 Broad Street, New York 

Phone Hanover 6547 



We Accept Commission Orders, 
But Prefer to Act as Dealers 

DEALFRS IN 

Camp Bird Esperanza El Oro Oroville Dredging 
Santa Gertrudis Tomboy Alaska Treadwell 
Oriental Consolidated 
English Marconi, Common and Preferred 
American Marconi Canadian Marconi 

C. S. BURTON & COMPANY 



MINING AND SCIENTIFIC PRESS 



61 



SLIGHTLY USED MINING AND MILLING MACHINERY 

2 — Tremain Steam Stamp Batteries. 

— 50 H. P. Gambert Feed Water Heater. 
— 100 H. P. Gambert Feed Water Heater. 

— 60 H. P. Woodbury Horizontal Steam Engine. 

— 15 H. P. Nagle Vertical Steam Engine. 

— 6 H. P. Vertical Boilers. 15 — Blowers, all sizes. 

— 10 H. P. Vertical Boiler. 5 — 16 cu. ft. Ore Car». 
— 195 cu. ft. Norwalk Compressor. 

14x7x13 Cameron Sinking Pump. 
5%x8 Deming Triplex Pump. 
— 4-compartment Richards Pulsator Jig. 
— 7% H. P. 3-phase, 60-cycle, 440-volt Motor. 
— 12x12 Fraser & Chalmers Rolls. 
— 75 K. W. National D. C. Generator. 
— 13 H. P. Model Gasoline Engine. 
— 200 H. P. Fraser & Chalmers Corliss Engine. 
— 9x10 Davis Friction Hoist. 1 — 6x8 Geared Friction Hoist 
— 100 H. P. 3-phase, 60-cycle, 440-volt Motors. 

— 60 H. P. 3-phase, 60-cycle, 440-volt Motor. 

— 25 H P. 3-phase, 60-cycle, 440-volt Motor. 

— 50 H. P. Electric-Driven Hoist. 

— 15 H. P. Gasoline Hoist. 1 — 10x 4 Blake Crusher. 

— 8x 6 Wallace Crusher. 1 — 8x24 Wallace Crusher. 
—12x12 Crushing Rolls. 2— Perrins Filter Presses. 

THE S. H. SUPPLY & MACHINERY CO. 



1732-1750 Waiee Street. 



Denver, C«l«rad«. 



BLAISDELL VAT EXCAVATORS 

Vacuum Slime Filters El Oro Tube Mill Lifting 

BLAISDELL COMPANY, *£2m&2;33*' 

1135 Real Estate Trust Bdg., Philadelphia, Pa. 



MAGNETIC SEPARATORS 

We can prove to you that we have the most efficient 
separator on the market. Write us for Catalog "Jfi." 

UNITED IRON WORKS COMPANY, Springfield, Mo. 



PLACER DREDGES 

Steam Shovels, Cranes, Loco-Pile Drivers, Rotary Snow Plows, 
Unloading Plows, Drag Line Excavators, Dredges of Every Type. 

BUCYRUS COMPANY, P. 0. Box 0, Sooth Milwaukee, Wis. 

50 Church St.. New York Yuba Construction Co., San Franaico 



Great Western Smelting & Refining Company 

Spear and Folsom St., San Francisco. 

Babbitt Metal for all kinds of service requirements. 
We buy all classes of scrap metal. 



PAPER 



BLAKE, MOFFIT & TOWNE 

37 to 45 First St., San Francisco 



Los Angeles 



Portland 



PIPE 



SECOND 
HAISJD 

Very best quality of selected second-hand water pipe 
and standard casing pipe. All newly cut threads and new 
couplings attached; asphaltum dipped. Fully guaranteed. 
At extremely low prices. BUY NOW while the oppor- 
tunity prevails. 

WEISSBAUM PIPE WORKS. 139 Eleventh SI.. San Francisco. Cat. 




SILVER PLATED COPPER 
AMALGAM PLATES 

FOR SAVING GOLD 

Most extensive and successful 
manufacturers. Old plates re- 
plated — made equal to new. 



San Francisco Plating Works 

1349-51 Mission St., San Francisco. 
E. C. DENNISTON, Prop. 

Get our prices. Catalog sent. 

Telephone Market 2916. 



BOOKS 



Our catalogue of tech- 
nical books makes the 
finding of any particular one an easy task. 
We will be glad to send you a copy. 

MINING AND BOIENTIFIC PRESS, 420 MARKET 8T., 8AN FRANOI800 



Second Hand Machinery 

BARGAINS IN REBUILT MINING AND MILLING 
MACHINERY OF ALL KINDS 

Detailed List of stock on hand sent on request. If you want 
certain Machinery at bottom prices, write 

DT lV/fr-M A QHTITP 1112-1120 folsom street 
. J. IVlCiyi-TYO 1 11,1V, SAN FRANCISCO CAL. 



Knight Ball Mill— Jones Fine Breaker 

CAPACITY— 40 Tons per 24 hours. 

HORSEPOWER — Mill, 8; Breaker, 5. Send for Catalog. 

STRAUB MFG. CO., 427-431 Third Street, Oakland, Cal. 



J. S. FREE, Mining Engineer. E. A. TAYLOR, Mining GeologiBt. 

FREE & TAYLOR, 

ENGINEERS & OPERATORS. 

Mining Properties Bought, Sold and Developed. Dealers In 
Rare Minerals. 

Office. : 331 D. F. Walker Bide, Salt Lake City, Utah; Thomoson Blk., Pioche, Nevada. 



THE DENVER QUARTZ MILL & CRUSHER CO. 

Manufacturers of Rock Crashers. Ore Feeders and all kinds ol 
Ore Milling Machinery. Especially the Denver Quartz Mill, 

for Regrtndlng to 200 mesh when wanted. Ask for Catalogue No. 6. 

1710 BROADWAY, DENVER. COLO. 



PELT0N SI WATE R WHEELS 

The Pelton Water Wheel Co. 



2229 Harrison St., San Francisco 



89 West St., New York 



elephant -brand j THE PHOSPHOR BRONZE SMELTING CO. 

Jtijjpp|aw | 220O WASHINGTON AVENUE. PHILADELPHIA. PA. 

UP? ELEPHANT BRAND . //yX , Wkxp 

INGOTS, CASTINGS, WIRE. SHEETS. RODs! Etc. 

/ C / |X — DELTA METAL- 

ED I U AX | im BARS FOR FORGING AND FINISHED RODS 



REG. U. 3. PAT. OFF. 



FOR SALE 

We offer for one of our clients a mill with 
complete gold mining machinery equipment, 
now located on the Fanny Edell property about 
15 miles from Cle Elum, Kittitas County, Wash- 
ington, either completely as it stands or will 
sell the machinerv separately. The mill has a 
capacity of making a product of 40 tons per 24 
hours that will pass 40 mesh screen. The ma- 
chinery is in first-class condition, practically 
new, as it has hardly ever been used. The prin- 
cipal items of machinery are as follows: one 
4x8 grizzly, one 7y 2 x 11 Samson crusher, one 
Elspass mill and feeder; one 50-ton Pierce 
amalgamator and car; two Standard concen- 
trators; one 30 HP. automatic engine; one 40 
H.P. boiler; one 7 H.P. vertical engine, Stand- 
ard heater, copper plates, belting, shafting, etc. 
The original cost of the mill and machinery 
about $11,000.00. Any good reasonable offer 
will be accepted. SHORT & GLEYSTEEN, 
Cle Elum, Wash. 



MINING AND SCIENTIFIC PRESS 



TANKS=PIPE 

CYANIDE PLA NTS 

Tanks For All Purposes- 
Mining, Oil, and Water 

Continuous Stave Pipe 12 in. to 12 ft. shipped knocked 
down and erected in place. 

Machine Banded Pipe 2 in. to 24 in. made up ready to lay. 

Our Portland factory makes a specialty of Douglas Fir 
Pipe and Tanks. At San Francisco and Los Angeles we use 
the famous California Redwood. 




Wood Pipe 2 inches to 12 feet diameter for heads up to 
400 feet, made from California Redwood or Washington 
Douglas Fir, for 

WATER WORKS— MINING— SEWERS— IRRIGATION 

For prices and general information, address nearest office 

Pacific Tank & Pipe Company 

SUCCEEDING 

National Wood Pipe Co. : Pacific Tank Company 

Have You a Copy of Mining Catalog No. 7? 
OFFICES 

318 Market St., San Francisco, Cal. Kenton Station. Portland, Ore. 

404 Equitable Bank Bide., Los Angeles, Cal. 

FACTORIES : San Francisco, Cal. Portland, Ore. Los Angeles, Cal. 






Standard Palp Thickener and Classifying Tank. 



American Bridge Companv of New\ork 

Hudson Terminal-30 Church Street, Newark 



( \Manufacturers of Steel Structures of all classes 

particularly BRIDGES AND Buildings 




NEW YORK. N. Y , Hudson Terminal. 
30 Church St. 

Philadelphia, Pa., - Pennsylvania Building 

Boston, Mass., Oliver Building, 141 Milk St. 

Baltimore, Md., Continental Trust Building 

PITTSBURGH, PA., - - Kriclc Building 

Rochester, N. Y., - - - Powers Block 

Puffalo, N. Y., - Ellicott Square Building 

^ncinnati, Ohio, - Union Trust Building 

Atlanta, Ga., - Candler Building 

Cleveland, Ohio, - - Rockefeller Building 

Detroit, Mich., Beecher Ave. & M. C. R. R. 

Export Representative : United States Steel 



CHICAGO, ILL., Commercial National 

Bank Building 

St. Louis, Mo., Third National Bank Building 
Denver, Colo., First National Bank Building 
Salt Ijkc City, Utah, - - Dooley Block 
Duluth, Minn, - - Sherwood Building 
Minneapolis, Minn., 7th Ave. ii 2d St., S. E. 

Pacific Coast Representative : 
U. S. Steel Products Co., Pacific Coast Dept. 
SAN KRANCISCO, CAL., Rialto Building 
Portland, Ore., ... Selling Building 
Seattle, Wash., 4th Ave. So., Cor. Conn. St. 
Products Co., 30 Church St, New York 



July 6, 1912 



MINING AND SCIENTIFIC PRESS 



63 



Yellow Strand Economy 

Yellow Strand is the most economical wire rope 
in the world for heavy work because it lasts longest. 

It lasts because it's made to last, 
from special imported steel wire of 
240,000 to 260,000 pounds per 
square inch tensile strength. 

Over a third of a century of wire rope 
making experience has taught us how to 
lay that high class wire into rope that com- 
bines unusual flexibility and elasticity with 
its tremendous strength. 

"Yellow Strand in your rope Means 
Yellow Gold in Your Pocket" — always — 
every time. 

B. & B. Aerial Wire Rope Tramways 
Save Labor, Time, Money 

A B. &B. Two-Bucket Tramway saves Logansport, Ind., 
94 per cent of its expense for hauling coal to its lighting plant 
and pumping station. The haulage cost by wagon was 50 cents 
per ton. Now it is only 3 cents. And this cost includes labor, 
power and depreciation. 

Ask our Tramway Department for further details. 
Write for Catalog No. K45. 

BRODERICK & BASCOM ROPE CO. 

SAINT LOUIS, MISSOURI 




San Francisco, 72 Fremont Street New Orleans, La. 



64 



MINING AND SCIENTIFIC PRESS 



July 6, 1912 



ROCK CRUSHERS 

OF VARIOUS STYLES AND SIZES CONSTANTLY IN STOCK 

NEW IMPROVED HUNTINGTON MILL 



Mining 
Machinery 
of all kinds 




Machine 
Shop 

Equipment 



DODGE IMPRO\ ED ROCK BREAKER 



LET US FIGURE ON YOUR REQUIREMENTS 



HARRON, RICKARD 
& McCONE 

San Francisco Los Angeles 




Elevating', Conveying and Screening 

Machinery 

We maintain a special department in charge of 
experienced engineers devoted exclusively to this 
class of work — and we have the most complete 
stock of Elevating, Conveying, Screening and 
Transmission Machinery on the Pacific Coast. 

CAN WE BE OF SERVICE TO YOU ? 
Send lor Catalog 

Asm Sc Gkrttfroii 
dtmtpattg 

SAN FRANCISCO SEATTLE SPOKANE 

55 Msln St. 558 First Avenue, South 212S.PostSt. 

PORTLAND LOS ANGELES 

67rFrontiSt. 130 N. Los Angeles St. 




Science has no enemy save the ignorant.' 



Whole No. 2712 Tumb e er 10 2 5 



SAN FRANCISCO, JULY 13, 1912 



THREE DOLLARS PER ANNUM 
Single Copies, Ten Cents 



MINING AND SCIENTIFIC PRESS 

ESTABLISHED MAY 24, 1860. 



CONTROLLED BY T. A. RICKARD. 



H. FOSTER BAIN 
THOMAS T. READ - 
T. A. RICKARD - 



EDITOR 
ASSOCIATE EDITOR 
EDITORIAL CONTRIBUTOR 



SPECIAL CONTRIBUTORS: 

A. W. Allen. F. Lynwood Garrison. 

Leonard S. Austin. Charles Janin. 

T. Lane Carter. James F. Kemp. 

Courtenay De Kalb. C. W. Purington. 

J. R. Finlay. C. F. Tolman. Jr. 
Horace V. Winchell. 



PUBLISHED WEEKLY 
BY THE DEWEY PUBLISHING COMPANY AT 
420 MARKET STREET, SAN FRANCISCO. 
Telephone: Kearny 4777. Cable Address: Pertusola. 

Code: Bedford McNeill (2 editions). 



BRANCH OFFICES: 
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Canada $4 

Other Countries in Postal Union 21 Shillings or $5 

News Stands, 10c. per Copy. 
On Library Cars of Southern Pacific Coast Trains. 

L. A. GREENE ----- Business Manager 

Entered at San Francisco Postofflce as Second-Class Matter. 



TABLE OF CONTENTS 



EDITO RIAL: 

Notes 

Lead Mining in Missouri 

ARTICLES: 

Veta Colorada Mill and Cyanidation Plant — II 

Bernard MacDonald. . . . 

Dividends 

Mining in France Paris Correspondence 

Churn-Drilling in Shaft-Sinking Tom McCormac 

Copper Producers' Association Report 

El Porvenir Mine in the District of Mallama 

F. P. Gamba 

Gold Deposits of Gibbonsville, Idaho 

Francis Church Lincoln 
Regeneration of Cyanide Solution.. W. D. Williamson 

Dry Concentration of Placer Gold F. J. H. Merrill 

Short-Circuiting in Anode Tanks A. R. Ledoux 

The Cuyuna Iron Range Kirby Thomas 

Alumina as a Drying Agent F. M. G. Johnson 

The Coal Supply of Manchuria Edward di Villa 

Electric Pig Iron Production at Trollhattan 

Litigation at National 

Metal Mining in Missouri 

Silver in Peru 

DISCUSSION: 

Smelting and Refining Zinc-Box Precipitate 

H. R. Edmands 

Mine-Owners' Liability for Accidents .. A. J. Pillsbury 

SPECIAL CORRESPONDENCE 

GENERAL MINING NEWS 

DEPARTMENTS: 

Personal 

Obituary 

Market Reports 

Book Reviews 

Decisions Relating to Mining 

•Concentrates 

Recent Publications 

Commercial Paragraphs 



Page. 
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.. 89 



EDITORIAL 



VICTORIA, the pleasant and attractive capital of 
British Columbia, is to entertain the Western section 
of the Canadian Mining Institute, September 18. 



ARIZONA recently enacted a law making a mining 
property, operated under a lease, option, or other- 
wise, responsible for all bills for labor involved in work- 
ing the property. Similar bills have been enacted elsewhere, 
and certainly the laborer often needs better protection. 
The Supreme Court of Wyoming has, however, held that 
such a law is only constitutional when it applies to all 
classes of industry. 



CEMENT-MAKERS did not have a good year in 1911, 
according to figures collected by Mr. E. F. Burchard, 
of the United States Geological Survey. While the total 
dut put of the United States was 79,547,958 barrels valued 
al $(30,705, 130, the actual increase, 1,500,000 barrels, was 
the smallest in 13 years. An interesting fact shown by the 
statistics is that California now ranks third in production 
and second in value of output. 



SAN FRANCISCO engineers have long had the pleasant 
habit of lunching together frequently. This has now 
crystallized in the formation of an Engineers Club, which 
is to meet at luncheon at the Palace hotel on Tuesdays. 
Mr. C. W. Merrill lias been chosen as first president of the 
club. Associated with him on the executive committee are 
Messrs. A. H. Babcock, M. H. Peck, A. M. Hunt, and H. 
Foster Bain. It is hoped to make the club an effective 
agency for promoting mutual acquaintance and a pleasant 
medium for the entertainment of visiting engineers. 



ADVICES from Washington announce the serious illness 
of Mr. W. J. McGee, long prominently connected with 
the United States Geological Survey and the Bureau of 
Ethnology, and now soil expert in the Department of Agri- 
culture. Mr. MeGee's many friends will hope that the ac- 
count of his poor health may prove exaggerated. A strong, 
self educated man of vigorous intellect and philosophical 
bent of mind, he has contributed notably to the progress of 
geology and related sciences, and at the same time his 
friendly interest and quick sympathy have stimulated many 
a young scientist to better work. Impatient as reformers 
usually are, he has given a good account of his talent. 



EFFORT is being made to revivify the California Miners' 
Association, and a meeting of the executive committee 
has been called at the St. Francis hotel July 15. The 
Association was for years a powerful influence voicing 
the needs of mining industry of the state. It has 
a long and honorable record for good work, but in recent 
years has lain dormant, only a skeleton organization being 
maintained. The approach of the time of holding the 
Panama-Pacific Exposition and the desirability of assuring 
an adequate exhibit of • Western minerals and mining 
methods leads the officers to believe that the general work 
of the Association should be resumed, and all those familiar 
with its history will wish them the fullest measure of 
success. 



:is 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



THE fiscal year at Washington closed with a surplus of 
$32,000,000, as against one of $45,682,000 in 1911. 
Except for the failure of Congress to pass usual appropria- 
tion bills there would have been a deficiency. It is inter- 
esting to note that customs yielded $310,000,000. internal 
revenue $292,000,000. and the corporation tax $27,000,000. 

SMOKE problems are attracting large attention through- 
out the coal-burning territory, but nowhere is a more 
determined effort being made to overcome the nuisance than 
in Pittsburg, long known as the 'Smoky City.' With rare 
good sense, foundation for success is being laid in broad 
research. A fund has been placed at the disposal of the 
University of Pittsburg and a special staff has been or- 
ganized to carry on the work. At present the investigation 
is being conducted by a force of twenty-five, of which seven 
are giving their entire attention to this task. Some of 
these men are studying the effect of smoke and soot on the 
atmosphere, on the weather, on plant life, on buildings, on 
the public health; some are investigating the economic 
damage done by smoke and soot ; others are making a de- 
tailed study of the mechanical devices for preventing or 
abating smoke: and still others are inquiring into the chem- 
istry and physics of smoke and soot, into the laws concern- 
ing the smoke nuisance, and into the history of the subject* 
as a whole. Recognizing the interest in the smoke problem 
manifested by a large number of American cities, and in 
response to inquiries that have recently been made, it has 
just been announced that the members of this staff are 
prepared to lecture upon various phases of the problem 
upon request. Those interested should apply to Mr. K. C. 
Henner, who has general charge of the investigation. 

COMMERCIAL attaches are utilized by European coun- 
tries as a means of detecting trade opportunities before 
they have been utilized by rival nations, and an important) 
part of the success attained by Germany in foreign trade 
is due to her successful use of such means. Recently the 
Associated Chambers of Commerce of that country have 
suggested that commercial attaches should be stationed at 
consulates, in order to be in closer touch with trade than is 
possible at the great capitals, where industry is apt to be 
subordinated to polities, and the suggestion is typical of the 
spirit of intelligently directed effort which characterizes de- 
velopment of German trade. Example is more stimulating 
than precept, and, by the initiative of Messrs. H. A. Wheeler 
and J. H. Fahey, the American Association of Commerce* 
and Trade has been formed in Berlin to "provide a national 
clearing house for the development and consideration of 
business opinion and to secure united action upon questions 
affecting the commercial interests of the United States. 
Only questions of national importance shall be considered." 
The Association should be able to accomplish much, and it 
is to be hoped that the movement will receive the support 
it deserves. The great trade opportunities of the future 
lie in the Orient, not in Europe, and it is discouraging to 
contemplate the trade relations between the United States 
and Oriental countries. In contrast with Germany, where 
consuls are, in many instances, men possessed of expert 
knowledge concerning trade conditions, American con- 
suls in the Far East are, though otherwise competent, fre- 
quently devoid of more than a vague general knowledge of 
industry and the conditions which govern it. and no attempt 
is even made to supply the deficiency by the appointment of 
commercial attaches, though even such small European coun- 
tries as Sweden maintain commercial attaches at Peking 
and Tokyo. When American trade with the Far East is 
fostered by intelligent and well directed effort a better 
showing in completion with European countries may be 
expected. 



EXTENSIVE preparations are being made for the 
twelfth session of the International Geological Con- 
gress which is to be held in Canada next year. Excursions 
have been arranged preceding and following the meeting to 
all parts of the Dominion, from Nova Scotia to British 
Columbia, and an attractive program is being arranged. 
The special topics proposed for discussion include: the 
coal resources of the world ; differentiation of igneous 
mamnas; the influence of depth on the character of metal- 
liferous deposits: origin and extent of pre-Cambrian sedi- 
mentaries; subdivisions, correlation, and terminology of the 
pre-Cambrian; to what extent the Ice Age was broken by 
interglacial periods; the physical and fauna) characteristics 
ot t lie Paleozoic seas with reference to the value of the 
recurrence of seas in establishing geologic systems. The 
International Congress is a widely representative body of 
great usefulness. At the last session, in Stockholm, the 
various countries were represented as follows: Algeria. 
:>• Germany, 101; Argentina. 2; Australia, AustTO-Hun- 
gary, 04 : Brazil. 1 ; Bulgaria*. 2; Canada, (i; China. 1; Den- 
mark, 22; Egypt, 3: Spain. 9; United States, 63; France. 
53; Great Britain, 44 ; India, 1 ; Italy, 30; Japan. 0; Mexico, 
7; New Zealand. 2; Holland. 13; Portugal. 4; Rumania, 9; 
Russian Empire, 56; Sweden, 134; and Switzerland, 16. 
It is anticipated that about 1000 persons will take part in 
the Canadian meeting. Two previous sessions have been 
held in America, one at Washington in 1891 and another in 
Mexico in 1906. Both meetings were notably successful 
and it is anticipated that that to be held next year will sur- 
pass them. A copy of the preliminary circular and pro- 
gram, in French or English, may be obtained upon applica- 
tion to Mr. R. W. Brock, general secretary. Victorian 
Museum, Ottawa, Canada. 

PATENT law is again thrown into controversy by tin- 
decision of the Massachusetts Supreme Court in the 
case involving the I'nited Shoe Machinery Company. It 
was here held that although the question of whether the 
company is "an illegal combination in restraint of trade 
and lias monopolized trade and commerce between the sev- 
eral states." musl be decided ultimately by the United 
States Supreme Court, "no word or phrase in the Sherman 
anti-trust act reveals an intent to exempt the owners of 
patents from its sweeping provisions auaiust monopolistic 
combination. The conclusion seems to follow that the com- 
prehensive condemnation of the act against every person 
who monopolizes interstate commerce by combination with 
the others includes holders of patents as well as others." 
The company involved was one formed to perfect and 
maintain a monopoly by use of patents. There have been 
many similar cases, such as the reputed fact that it is im- 
possible to purchase machinery for use in a steam laundry 
except the purchaser agrees to maintain a certain standard 
schedule of retail prices. It was fear of the extension of 
such a policy rather than any desire to rob inventors of 
just reward for their skill, that led to the popular outcry 
against the recent decision of the United States Supreme 
Court. If a clear line can be drawn between proper and 
improper use of patent monopoly, and the contention of the 
Massachusetts court sustained, there is no valid reason for 
objecting to the doctrine laid down by the Supreme Court. 
It is one thing to maintain that the maker of a manifolding 
machine may take his royalty in the form of a legitimate 
profit on a required ink, and another to insist that no one 
shall buy a mangle unless he agrees to charge three cents 
for each collar lauiidried. Patents are sound in principle, 
and in any legitimate operation of the patent law the 
patentee needs, just now. more protection than the public; 
but patents should not be used to make legal what would 
otherwise be an illegal monopoly. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



39 



DRILLING contests are regularly a feature of Fourth 
of July celebrations throughout the West, and even 
across the Pacific the custom has spread. At Tonopah this 
year Page and Pickens established a new record by drilling 
45'/,,. inches in Bocklin granite in 15 minutes, striking an 
average of 60 blows to the minute. Lundquist and Dahlen, 
of Victor, Colorado, drilled 41'/ M inches, and Porter and 
Goddard, of Oatman, Arizona, 38'/ 18 . At Lowell, Arizona, 
a shoveling contest was held, the task being to shovel two 
tons of ore over a partition three feet high. The prize of 
$100 was won by Henry Ames, who completed the task in 
8 minutes. His nearest competitor, Frank Travels, was 26 
seconds slower. 

Lead Mining in Missouri 

Statistics of metal mining in Missouri in lilll, compiled 
by Mr. J. P. Dunlop of the United States Geological Sur- 
vey and summarized on another page, invite comment. The 
total value of the state's production of lead, zinc, copper, 
and silver in 1911 is placed at $30, 171, .'ill ; a very consider- 
able sum. It is interesting tn note that toward this total, 
silver contributed +211,430 and copper $80,051, and that 
production of both is increasing. Missouri mines now yield 
49,867 ounces of silver and 040,411 pounds of copper, 
which fact will come as a surprise to those who think of 
Missouri as only a lead-zinc state. It is true that the most 
important contributions to the world's metal production 
now being made by Missouri are in the form of zinc and 
Jead. In zinc the state has long ranked first, and shows 
no signs of impending loss of standing. In lead Missouri 
has held first place since 1007 when Idaho was passed in 
the race. Missouri lead mines have been known since the 
•earliest settlement of the Mississippi Valley, but with the 
development of the silver-lead deposits of the Rocky Moun- 
tain regions attention was diverted from them and it was 
thought that their importance had ceased. This proved to 
be an error. When the price of silver dropped one-halt', 
a new period of development began in the lead fields of the 
Mississippi Valley, and they now occupy their old place of 
first rank. 

The greater part of the lead output of Missouri comes 
from the southeastern district. In 1911 the crude ore mined 
there equalled 3,974,712 tons and in the central and south- 
eastern districts together, 219,145 tons of concentrate was 
produced. Since the output of the central Missouri district 
is relatively insignificant, this means that the five big com- 
panies operating in the Flat River district furnish nearly 
half the lead produced in the United States. The lead 
content of thg crude ore in this district is 3.7 per cent. 
From this is made a concentrate containing 67.3 per cent 
lead and worth $40.94 per ton. The yield of concentrate 
from the crude ore equals 5.5 per cent. These are Mr. 
Dunlop's figures and are based upon returns from all the 
-companies. One concern is, however, known to work ores 
.averaging about 3 per cent lead and worth, accordingly, 
about $2.40 per ton in the ground. Even at this there is 
a profit since the saving is about 85 per cent and the 
operating cost, roughly, .$1 per ton. Some of the Missouri 
companies have had a long struggle but all are now making 
money. While they do not distribute stockholders reports it 
is known that one cleared about $750,000 last year, an- 
other $500,000, and that others did proportionately as well. 
Though the plants are large they are simple and the invest- 
ment charge, other than for land, is not unusual, taking 
into account the fact that each company, except the Doe 
Run which is affiliated with the St. Joseph, owns its smelter 
and markets its own metal. 

It is interesting to compare these figures with those of the 
Bunker Hill & Sullivan Mining & Concentrating Company, 



operating in the Coeur d'Alene district of Idaho. This 
great company has mined to the close of 1911, 4,883,408 
tons of ore having a gross value of $47,581,988 and has 
made an operating profit of $19,009,303, paying dividends 
to the amount of $12,701,850. Roughly the ore is worth, 
gross, $10 per ton; it costs $6.75 per ton, including freight 
and treatment ; and the profit has been a trifle over $3.25. 
The recoverable value of the ore in 1911 averaged $7.55, of 
which $1.49 was due to the silver content. The ore is much 
more complex than in Missouri, milling costs more, and t he 
tailing losses are higher. The gross value per ton of Coeur 
d'Alene shipping ore and concentrate was greater than that 
of a ton of Flat River concentrate, the figures being $50.14 
and $40.94 respectively, the difference being due to the 
silver content. Operating costs at the Bunker Hill & Sulli- 
van mine are $2.03 per ton ; about twice as large as in the 
best Missouri practice. The ore, however, is richer; contain- 
ing 9.59 per cent of lead and 3.81 ounces of silver as against 
3 to 3.7 per cent lead and no silver at Flat River. Freight 
and treatment charges are much higher in the case of the 
Idaho ores than in that of those from Missouri. Another 
striking difference is in the character and form of the ore- 
bodies in the two districts. In Idaho the lead is found, in 
the form of galena mixed with other sulphides and carbonate 
of iron, metasomatically replacing quartzite along fault 
fissures. In Missouri the galena, with only slight admixture 
of other sulphides, occurs impregnating nearly horizontal 
beds of dolomite of great thickness and extent. The galena 
shows a marked preference for certain layers and for beds 
of peculiar physical condition and chemical composition, 
and its distribution is, in detail, extremely irregular. In 
Idaho it is possible, and customary, to develop and carry 
large ore reserves; that of the Bunker Hill & Sullivan 
company is now estimated at 3,521,050 tons. In Missouri, 
in a large way, there are no reserves and a steady output is 
maintained by keeping open a considerable area of 'face.' 
The conclusion should not be drawn that the companies 
operate 'f rom hand to mouth'. In fact they have in each case 
excellent assurance of long continued production, but this 
is not in the form of proved ore reserves. Since 1867 the 
diamond-drill has been commonly and largely used in this 
district. It was in truth the application of the drill that 
made possible all the modern development. It is not 
customary to figure in tonnage the proved or probable re- 
serve found by drilling, for the reason that experience has 
shown that individual holes are extremely deceptive. Con- 
ditions are not comparable with those in copper mining 
where great confidence has come to be felt not only in the 
general but the specific results of drilling. In Missouri the 
character of the rock, especially the content of organic 
matter, is often as significant as the actual amount of lead 
present. Drilling here is of the greatest service in show- 
ing the general trend of the orebodies but not their actual 
content. One of the most capable and successful engineeers 
who has worked in the district came, in time, to rely much 
less on the drill than on constant study of the face of the 
mine, calmly confident that the ore was continuous over 
large areas in some direction and could be followed under- 
ground. The orebodies are large and stopes are acres in 
extent ; the ore is simple and the conditions for working- 
excellent ; fuel supplies, and labor are near at hand; and 
there is a ready market for the output. All these factors 
have enabled 1 he Missouri companies, with a leaner ore and 
no silver, to gain upon their capable and energetic compet- 
itors in the West, and no one even superficially acquainted 
with the district can doubt that the lead industry that began 
when the Spanish first hunted metal for making bullets, 
will continue for many years to contribute to the national 
wealth. 



4(1 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



Veta Colorada Mill and Cyanidation Plant — II 



By Berxard MacDonald 



( Continued from page 4.) 



Comments and Criticism 

In the first part of this paper* I gave an outline of 
the flow-sheet or travel of the ore pulp and solution in 
treatment through the mill of the Veta Colorada M. & S. 
Co., at Parral, Mexico. I propose now to submit com- 
ments and criticism of the millsite, machinery, and prac- 
tice. 

The Millsite. — The selection of a site for the erection 
of a milling plant is of fundamental importance, and the 
greatest care, considering all the factors bearing favorably 
or adversely on the economy of future operations, should 
be intelligently and carefully exercised before making the 
final location. The same is equally true and of only rela- 
tively less importance with respect to the sites of all ap- 
purtenant buildings such as power-house, machine-shop, 
precipitation-house, warehouse, and assay office. Before 
the grade stakes are finally set, the designing engineer 
should have a clear comprehension of all the factors com- 
mercially affecting future operations, and from them work 
out a favorable balance for the site to be chosen. The 
selection of a site that is ideally perfect is impracticable, 
even in the most favorable localities, but existing condi- 
tions should be so weighed and balanced that the best 
site possible shall be chosen. The preliminary investiga- 
tion and study necessary for this purpose is not always 
given by the designing engineer. It frequently happens 
that the site is arbitrarily selected by those who have little 
or no experience in mill construction or operation, and 
the engineer is left to do the best he can with the site 
so selected. Be this as it may. the fact remains that 
serious errors in the site of the mill or the accessory build- 
ings exact their toll from the beginning of operations. 

These reflections have been inspired from observations 
covering milling plants in general and not alone from the 
site selected for the Veta Colorada mill, although the site 
of that plant was not the best that could have been selected. 
The site for this mill was chosen too far down the hill- 
side (a mistake frequently made), whereas, with a few 
minor disadvantages, completely overshadowed by general 
improvement in facilities for construction and operation, 
the mill might have been placed from 50 to 100 ft. higher. 
Such a site would have saved considerable expense in grad- 
ing and retaining walls for the mill benches and in the 
disposal of the tailing of the ore treated, and the plant 
would have been more accessible for construction and oper- 
ation. 

Tn the design of the plant the old idea of placing the 
precipitation-room at the lower end of the mill was 
adopted. The result of this, coupled with the necessity 
of securing flow grades on the hillsides for the several 
benches of the plant, caused it to be stretched out so 
that it occupied a length of over 500 ft. from the crusher* 
bin to the precipitation-house. Notwithstanding this 
length, the site for the precipitation-house, and the sump 
tank and pump-house adjoining measuring SO by 150 ft., 
had to be blasted out of the solid rock to an average depth 
of 12 ft., and, to provide floor drainage, a small tunnel 
had to be run from the bottom of this grade to a nearby 
creek. The precipitation-house, as designed and built, was 
75 by 100 ft., just twice the size required, and at the 
place selected it was the most distant of all of the mill 
buildings from the offices and living quarters of the Amer- 
ican employees, which made its supervision and protection 
more difficult. 

Tn completing the plant, I seriously considered aban- 
doning the use of this building for precipitation and the 

*See Mining and Scientific Press, July 6, 1912. 



erecting of a new one on the patio at the head of the 
mill, where it would have had all the advantages of being 
close to the company's offices and the living quarters of 
the American employees, but as the house had already 
been substantially built of masonry, floored with cement, 
and the sump tank and return pump erected, the expense 
deterred me from doing so. Had the mill been placed 
higher on the hillside, the steeper contour would have pro- 
vided for closer building of the several plant units, saved 
hundreds of feet of piping, and thousands of dollars in 
grading, besides affording better accessibility for super- 
vision and more economical conditions for operation. 

Poivcr Plant. — The placing of this plant, and the design 
of its machinery could have been improved. It was built 
close to the mill, to which fuel had to be hauled from 
the railroad terminal, and the boilers supplied with mine- 
water carrying deleterious solids in suspension, while, with 
a 7-mile transmission line, it could have been built at 
the junction of two railroads where fuel would have been 
cheaper and plenty of clear water for the boilers avail- 
able. And, for some reason hard to explain, the electric 
generators and the mill motors were designed for a 25- 
cycle current, a design at variance with common commer- 
cial practice. A 60-cycle electric plant was in existence 
at the time, designed for the sale of current to users in 
the district, and. at the present time, a 15.000-hp., 60- 
cycle. hydro-electric plant is bringing in its lines to the 
district to dispose of its power to the mines and mills. 
This power cannot be used in this plant without the in- 
tervention of 'frequency changer' and a corresponding con- 
sumption of power. 

The Pock-Breakers. — As already stated, these are of the 
'Australian type', which in operation close their jaws and 
crush the rock on the down-throw of the pitman, instead 
of on the up-motion as in the ordinary type. This anti- 
podean type may work satisfactorily in Australia, but as 
designed for this plant it did not do so. The force exerted 
in crushing: the rock on the down-thrust of the pitman re- 
acted upwardly on the bearing boxes of the fly-wheels, 
loosening and frequently breaking the stud-bolts that held 
down the caps. The keeping of the toggles in adjustment 
was also much more difficult than with the ordinary type 
of rock-breaker. 

Mortar Foundations. — These were built of concrete in 
separate blocks for 20 stamps at some time before work 
was suspended in 1007. I found these blocks oracked hor- 
izontally from end to end, the cracks being 6 to 12 in. 
apart, so that, at places, the top layers could he easily 
lifted by driving a gad in the cracks. I puzzled over this 
problem for some months pending the arrival of the mor- 
tars from the factory, and finally reached the conclusion 
that these cracks were due to one or more of the follow- 
ing causes: (1) the concrete was laid in layers and each 
layer allowed to dry before the next one above was laid 
down, the junction of the two contiguous layers constitut- 
ing a line of weakness along which the unequal shrinkage 
of the dry and wet concrete was manifested in the cracks; 
(2) the sand in the different layers of concrete differed 
in character and quantity; (3) the frequent but erroneous 
practice of putting a thin leveling layer of neat cement 
on top of the block, instead of laying the block a trifle 
high and bringing it to proper level with .a chipping tool. 
It. was evident that the foundation blocks would crumble 
under blows at the stamps unless something was done to 
make the layers cohesive, for even the vibration of the 
blow of a sledge at one end of a block could be plainly 
felt at the other. To dig out the foundations and put 
in new ones, it was estimated, would have cost $.5000. This 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



41 



would have been safe, but that portion of the mill build- 
ing was roofed and sided with corrugated iron and would 
have had to be stripped, as blasting would have been 
necessary in order to get out the deeper sections of the 
blocks. I finally concluded to have the blocks drilled with 
vertical holes to the depth of 30 inches, 30 holes under 
each two mortars and the shoes of the battery posts, and 
dropped into each hole a piece of %-in.. octagon drill 
steel 30 inches long, around which was poured melted 
sulphur until the hole was filled level with the top of the 
block. After this there was no vibration felt under the 
blows of the sledge-hammer, and the rubber pads were 
put on and the mortars bolted down. On two of the blocks 
the top leveling layer of concrete ranging from to 
iy 2 in. crumbled off. From these I removed the rubber 
pads and wedged up the -mortars to the level 
and tamped the space between them and the 
concrete solid with 'rust joint.' The result 
was satisfactory, as none of the foundation 
blocks showed any signs of weakness under 
operation. 

Concentration. — The mill is equipped with 
24 concentrating tables, which were put into 
service when operations began. Owing to the 
fact that the dump ore to be treated was the 
ferruginous oxidized low-grade material dis- 
carded from the ore previously mined from 
the upper levels, and that most of the other 
ore treated in the mill was of the same char- 
acter, it was not practicable to make a clean 
grade of concentrate that could be profitably 
shipped to the smelters. After tests showed 
that better commercial results could be ob- 
tained from cyaniding the pulp without con- 
centration, the tables were left idle and the 
pulp treated entirely by cyanidation. The 
concentrators remain in place ready to be 
started if complex sulphide ore is found in 
the deeper levels. 

Tube -mills. — These measure 5 by 14 ft. 
and were originally designed to be driven by 
30-hp. motors, but before starting I substi- 
tuted 40-hp. motors, and even these had 
barely enough power to start the loaded mill 
from rest without reverse swinging. The 
spur and pinion gearing by which the motors 
operated the mill, proved not to have suffi- 
cient strength for the strains of operation, 
and after a couple of months' use three of 
these broke and were replaced by belt pul- 
leys. The motors, when connected by belts, 
started the tube-mills with greater ease than 
when previously connected by spur-gearing. 

It will be interesting to millmen to know of a little 
device by which I improved the grinding capacity of the 
tube-mills and lightened their running load. The dis- 
charge openings of the tube-mills were of 7-in. diameter and 
the pebble charge came up to the bottom of these openings, 
or 3V2 in- below the longitudinal centre of the mill when 
at rest. I reasoned that if the discharge opening was 
smaller, so the mill could be loaded with pebbles until the 
longitudinal centre line of the mill was reached, this 
load would be easier started and better grinding would 
be done. To test this idea, I had a wooden plug 8 in. 
long turned on the lathe to the exact fit of the discharge 
opening and a iy 2 -in. hole bored through the centre line of 
the 8-in. dimension. This plug was driven snugly into 
the discharge opening and the mill filled with pebbles an 
inch or so above the centre. The result was very gratify- 
ing, the mill was easier to turn over from rest and to 
run than with the lower charge of pebbles, and the grind- 
ing was better. Since this time I have recommended this 
in other mills, where it showed similar favorable results. 

Agitation Tanks. — As stated at the beginning of these 
notes, the plant, as originally designed, provided for the 
dual treatment of the pulp as sand and slime. For the 



agitation of the slime, tanks 25 ft. in diameter by 12 
ft. high equipped with stirring arms were provided ira 
the original design and in 1907 two standard Pachueaj 
tanks 25 ft. in diameter by 45 ft. high were purchased- 
Most of the material for these tanks had reached the site,, 
but none of them was erected. 

For some years previous I had been developing and! 
experimenting with a system of pneumatic agitation with 
the object of overcoming the defects of the Pachuca tank 
system, namely: (1) The uneconomical shape of the tank, 
having small diameter and great height, which provided 
small holding capacity per pound of steel employed irs 
the construction; (2) the high consumption of compressed! 
air for the work done, and the trouble and expense for 
operating the rubber sleeve air nozzle; (3) the vertiea! 




PACHUCA TANK. 



PARRAL TANK. 



settlement of the pulp immediately around the central rift- 
pipe and the consequent imperfect mixture of the solid" 
and solution constituents of the pulp charge around the 
side of the tank. 

By experiments based on scientific principles, I had! 
developed a system which worked out satisfactorily in ai 
small way and promised to eliminate the defects above- 
mentioned, and now the opportunity of applying it otr> 
a large commercial scale was presented. But what were- 
to be the dimensions of the first 'Parral tanks' to make- 
file best compromise of the various conditions existing at 
this plant? The factoi-s to be equated in the compromise' 
were: (1) my former ideal of an agitation tank to be- 
of such dimensions as would give the greatest holding 
capacity per pound of steel used in its construction; (2) 
the height of the two standard Pachuca tanks, to be units; 
in the series, the steel- plate for which was in stock; (3)' 
a large quantity of steel plate shaped for the original] 
agitation tanks 25 by 12 ft. which was in stock; (4) ar- 
rangement of tanks suitable for either the individual or 
continuous processes of treatment as would prove best 
under experiment; (5) the original design to make the 
plant's capacity 500 tons per day to be carried out so far 



42 



MINING AND SCIENTIFIC PRESS 



July 13, 1!>12 



as the machinery and material in stock would permit. 

The compromised design and dimensions of the agita- 
tion tanks under these conditions resulted in a battery of 
tanks consisting of the two Pachucas, each 15 ft. in diam- 
eter by 45 ft. high, and five Parral tanks, each 25 ft. in 
diameter by 42 ft. high. The Pachucas had a holding 
capacity of 83 metric tons each and the Parrals 250 metric 
tons each; the pulp consisting; of two parts by weight of 
solution to one of the dry solids. With the exception of 
one of the Pachuca tanks, which was set apart as a stor- 
age tank for the wash-water required for the filter-presses, 
these tanks were 'piped' top and bottom so as to be oper- 
ated by either the individual or continuous agitation sys- 
tems as might be demonstrated by test to be preferable. 
The Pachuca tank was equipped in the usual way with 
the central transfer pipe, 10" ft. diameter, provided with 
the lH-in. pipe with rubber sleeve nozzle for tlie intro- 
duction of compressed air as furnished by the manufac- 
turers, and the Parral tanks were equipped with four 12- 
in. transfer pipes, each of which was provided with a 1- 
in. eonipressed-air pipe equipped with a ball-valve nozzle. 
Operation was commenced and continued one month by 
the continuous process of agitation treatment and then 
changed to the individual process. So far as the extrac- 
tion went, there was no difference shown by either process 
over the other, but on account of its greater economy and 
simplicity of operation, the continuous process was adopted 
after the tests. 

The Pachuca and Parral Systems. — The Pachuca tank 
here gave as favorable results as usual, and. in comparison 
with the Parral tanks, 

"I could have been happy with either. 
Were the other dear charmer away." 
However, in this case, there was a decided difference be- 
tween the charmers. So far as it was possible to deter- 
mine the amount <>f air consumed in the tanks operating 
side by side, treating pulp of the same specific gravity, 
by t lie degree of valve openings on the compressed-air 
supply pipes of the same diameters, there was no greater 
consumption of air in agitating the Parral tank holding 
250 tons than in agitating the Pachuca holding only 91 
tons. Besides, the rubber sleeve nozzle in the Pachuca 
tank gave considerable trouble in starting up agitation 
after the compressed air was shut off for any reason, 
while, in the Parral tanks under the same condition, the 
ball-valve nozzles would start up agitation promptly with- 
out trouble. After the month's run, when the change was 
made from the continuous to the individual system of 
agitation, the rubber sleeve was found to be frazzled and 
to have lost its elasticity. At this time the 1-in. air-nozzle 
ball-valve was attached to the end of the lV^-in. pipe 
in the Pachuca tank, and afterward there was no more 
trouble in starting and the agitation was equally active. 



with appreciably less valve opening. The following letter 
from D. S. Colland, assistant to ('. W. Van Law. director 
for the Compania de Heal del Monte y Pachuca, will be 
interesting as corroborative evidence on this point. It 
relates to experience at Pachuca in February 11)12: 

"Just a word regarding the installation of ball-valves 
in our Pachuca tanks. Before the receipt of your letter, 
accompanied by the 1-in. valve, we had already tried out 
the %-in. that you had left here. As you know, the 
valves we have always used are the rubber sleeves outside 
of l^-in. air pipe. This pipe was reduced at the bottom 
of the tank for the %-'\n. valve and all the air turned on 
at the lV^-in. valve at the top. This resulted in the rising 
of the pulp in centre column but 2 in., the air bubbled 
simply forcing their way through the thick slime. Ppon 
receipt of the 1-in. valve it was' connected in the same 
manner and it worked excellently. The 1%-in. air valve 
at top of tank is opened about three-quarters of one turn 
for all the rubber sleeve valves, and the ball-valve has 
been operating now nearly a week, giving entire satisfac- 
tion. On last Friday the power was interrupted several 
minutes. The four tanks operated with rubber valves had 
to be opened full to start them, while the valve on the tank 
equipped with ball was not touched. As soon as the air- 
pressure came on, this tank began agitating exactly as 
before interruption. The slime during the test has been 
approximately 1.7 to 1." ' 

The Parral system of agitation, like the Pachuca, is 
effected by the continuous transfer of the pulp from the 
bottom to the top of the tank by air-lift, but the details 
of the method of operation by the two systems are en- 
tirely different. In the Pachuca. which is fitted with a 
cone-bottom, the agitation of the palp is effected by its 
continuous transfer from the bottom to the top of the 
tank, through a pipe lli inches in diameter fixed centrally in 
the tank with its intake near the apex of the cone at the 
bottom and the delivery end at or near the top of the 
pulp charge. The compressed air is delivered to the in- 
take end of the transfer pipe through a lV2-in. pipe 
capped at the end and perforated on the sides for a 
length of 6 to 8 in. back from the cap. To prevent the 
pulp from entering the perforations, a tight-fitting rubber 
sleeve is drawn over the end and clamped above the per- 
forated section. When the compressed air is turned on. the 
rubber sleeve expands against the hydrostatic pressure 
surrounding it. and the air passes out under it and, enter- 
ing and ascending through the transfer pipes, carries the 
pulp from the bottom and discharges it at the top of 
the tank. The mechanical defects which I found in the 
Pachuca tank and system of agitation will come under 
the following heads: 

1. The tall narrow shape of the tank with its compara- 
tively small holding capacity per pound of steel and its 
high cost of construction. 



— j— 

~Wrrn^Tanfc! — 

3r l"""f 

— P»choffa-T»nK=^ 



60 



60> 



W 24 30 36 42 

Data taken from average 

Of run in each tank 
Average Assays 
Head* Parral Tank SMg.Ag. 
Heads Pachuca Tank ' 338 g.Ag, 



12 18 24 30 30 42 
Data taken from charges with 
the same value In beads 
Assays 



/12 18 24 30 30 42 

Data taken rrOIU COnSfCUtiVC 

charging* with different values 

in beads 



Heads Parral Tank 
Heads Pachuca Tank 



SBg.Ag. 
332 g.Ag. 



V 

ft in neaus As? „ ys 

2 Heads Parral Tank 
1 Heads Pachuca Tank 



Ag. 
Ag. 



6 12 



18 Hours 



C Hours 



b Hours 



EXTRACTION-CURVES PLOTTED FROM RECORDS OF OPERATIONS IN PACHUCA AND PARRAL TANKS. SAMPLES TAKEN EVERY SIX 

HOURS AND ASSAYED. 



MINING AND SCIENTIFIC PRESS 



43 



July 13, 1912 

2. The cost of elevating the charge to tall tanks during 
operation, barring plants erected on exceptionally steep 
millsites. 

3. The imperfections of the means employed for admit- 
ting the compressed air to the lift-pipe, and excluding the 
pulp from choking the air-pipe during times when the 
air is shut off. 

4. The excessive amount of power necessary to gen- 
erate the high pressure and volume of air required to 
effect the agitation in a central lift-pipe of large diameter. 

5. The imperfect mixture of the solid and liquid con- 
stituents of the pulp in the tank during agitation. 

6. The difficulty of starting agitation when compressed 
air has been shut off and the solids in the pulp settled 
in the cone at the bottom of the tank. 

In the Parral tank system these defects have been elim- 
inated by the use of a plurality of transfer pipes of com- 
paratively small diameter, the number of these pipes being 
in proportion to the diameter of the tank, which may 
be economically proportioned to its height so as to give 
the greatest holding capacity per pound of steel or mate- 
rial used in the construction. The accompanying illustra- 
tion and table of comparison will indicate some of the 
advantageous features in construction of tin 1 Parral type 
of tank. 

Comparison Table of Corresponding Items in Standard 
Parral and Pachuca Tanks 



Points of Comparison. 


Parral. 


Pachuca. 




15 


45 


Diameter in feet 


25 


15 


Horizontal area in square feet 


490.8 


176.7 


Effective holding height in feet 


. 14 


39 


Holding capacity in cu. ft 


7(171 .2 


.6891 ..'5 


Holding capacity in metric tons of solids 






Pulp ratio: solution 2. solids 1 


92.8 


83.3 


. " iy 2 " i 


139.4 


125.3 


i " i 


155.3 


139.5 


Weight of steel plate and all construction 






Material in pounds 


14,650 


33,000 




157 


400 


Lb. air-pressure required for agitation 


.8 to 10 


30 to 50 


I have selected the dimensions 25 by 15 ft. as 


the stand- 



•ard size for the Parral tank for the following reasons : 

1. A tank of these dimensions makes a convenient unit 
for most plants, as it holds from 90 to 100 metric tons of 
■dry pulp of a specific gravity usually suitable in most 
•ores for treatment. 

2. The high holding capacity per pound of material in 
its construction. 

3. Its comparatively low height, which makes charging 
possible by gravity flow in most hillside plants, and per- 
mits agitation by compressed air of 8 to 10 lb. pressure 
per square inch. 

However, the system by which agitation is effected may 
be installed in and will work well in tanks of any diameter 
and any height. In the plant of the Veta Colorada M. 
& S. Co. the tanks were 25 ft. in diameter and the height 
was built up to 42 ft. to correspond with the Pachuca 
tanks included in the battery, as the walks on top and 
sampling platform could be more conveniently arranged 
in connection with a uniform' height. All the trouble and 
expense due to the short life of the rubber sleeve as a 
nozzle on the compressed-air pipe and the high consump- 
tion of air required to operate it (the total hydrostatic 
pressure of the tank charge on this sleeve being 850 lb.) 
in the Pachuca tank is obviated by the air-nozzle ball- 
valve of the Parral tank. This valve is balanced in the 
hydrostatic head of the pulp charge except about 50 lb. 
due to the seat area. These valves have been in continu- 
ous operation for 16 months without renewals or show- 
ing any sign of loss of efficiency, so their life limit cannot 
be fixed. With these valves, agitation has been started 
and brought to normal running in 15 minutes after the 
air had been shut off and agitation suspended for 24 
hours, by simply turning on the air. 



The imperfect mixture of the pulp charge of the Pa- 
chuca tank due to the vertical settlement of the pulp im- 
mediately around the central transfer pipe, is prevented 
in the Parral system by creating a rotary flow in the 
tank charge whereby the whole mass revolves round and 
round from top to bottom within the tank, and the solids 
are thus carried spirally in suspension, and therefore the 
distance of their travel from top to bottom of tank is 
many times greater than if allowed to settle vertically. 
The rotary flow is created by the force of the horizontal 
discharge from the several transfer pipes in the same direc- 
tion with respect to the side of the tank on the surface 
of the charge. 

The surprising facts in connection with the rotary flow 
in the tanks are that it is generated by so small a force 




COMMENCEMENT OP PULP TRANSFER IN PARRAL TANK. 



as the spouting from the discharge of the transfer pipes 
and that when generated on the surface of the charge it 
will extend to the bottom of the tank with sufficient activ- 
ity to prevent the settlement of the pulp in dead accumu- 
lations on the bottom such as takes place in tanks 42 ft. 
high. An analogy, showing the mobility of water under 
slight force and the persistence of flow when once created 
in it, is seen in the great ocean currents which, generated 
by the trade winds, revolve continuously between the shores 
of continents thousands of miles apart. The Gulf stream 
is generated by the easterly trade winds blowing on the 
surface of the Caribbean sea which drive these waters 
westward before them till they make their escape back 
again into the Atlantic ocean between Florida and Cuba, 
where, as is generally known, the flow of the current is 
6 ft. per second and its strength such as to sweep the 
sea-bottom, here 600 ft. below the surface, as clean as a 
floor and force the current in a rotary path across the 
Atlantic ocean to Europe and back again. Whether this 
analogy is correct or not, the fact remains that the rotary 
flow created at the surface of the charge in a Parral 
tank maintains a continuous revolution in the entire mass 



44 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



within the tank which keeps the solid and solution constitu- 
ents of the pulp in proper proportional mixture, in every 
part of the tank at all times during treatment, while 
the spouting of the pulp at the surface of the charge 
gives the aeration required for the chemical reactions. 

Extraction. — That tlio extraction is better in the Parral 
tank as compared with the Pachuca is shown by the dia- 
gram on p. 42. which is self-explanatory. The data from 
which the curves are traced were taken from the log rec- 
ords of the results obtained when both tank systems were 
being operated by the individual process. 

Chemical Constituents of Solution: 



KCN 15% 

Protective alkalinity 850 gm. 

Lead 3 gm. 

Physical Condition of Pulp: 

Dilution 2 to 1 

Specific gravity 1.26 



Screen sizes: +200, 15 to 20%; -200, 75 to 80%. 

Extraction : 
Prior to tank treatment, 10 to 20%. 
By tank treatment, as per chart. 
Total extraction, as per chart -4- 10 to 20%. 

In explanation of the percentage column of the above 
chart, it may be said that more than 62% of the metal was 
extracted during the first six hours' agitation. 

The low extraction shown in the turves was due to 
the character of the dump ores being treated. The dump 
as it was built up was mixed with accumulation of rotten 
timbers from the mine workings and the ashes and char- 
coal from the steam plant near the shaft. It contained, 
besides, the mud and oxidized matter from the ore-washer 
which was on the dump and used for washing the mine 
ore preparatory to hand sorting. 

The Kellii Filters. — These did satisfactory work on 
the slime, which was very clayey. The filter test made on 
the slime of an average sample of the ore before the 
filters were ordered, showed that under 40 lb. air-pressure 
it was only possible to build a cake % in. thick in 20 
minutes. In regular operation, after the presses were 
erected, there was no difficulty experienced in building a 
cake 1 in. thick in the same time and drying it to 15% 
moisture under 30 lb. air-pressure for 3 minutes. Had 
water not been available for flushing the discharged cake 
to the dump, it would have been dry enough at 15% 
moisture for disposal by belt-conveyor. Having filter 
capacity to spare, one of the filter-presses was very suc- 
cessfully used as a clarifier for the decanted solution from 
the Dorr thickening tanks on its way to the zinc-boxes 
for precipitation. This solution flowed through the leaves 
of the press by gravity under a head of 25 ft. and came 
out perfectly clear. About a ^-in. cake built up of 
the fine matter suspended in the solution would deposit on 
the leaves each 24 hours. This had to be discharged, as 
nearly all flow stopped when a %-in. cake would form on 
the leaves. 



Dividends 



The Colorado M. Co. paid a dividend of 3c. per share 
on June 25. 

The Daly West has declared a dividend of 30c. per share, 
payable July 10. This makes a total paid to date of 
$6,552,000. 

The Bunker Hill & Sullivan M. & C. Co. paid dividend 
No. 178 of $65,400 on July 3. This makes the total amount 
of dividends paid $13,584^750. 

The Wettlauf'er Mining Co. has declared a quarterly divi- 
dend of 2%%, with an extra dividend of 2^%, payable 
July 20. This brings the total dividend disbursement to 
30% of the capital. 

The Colorado Fuel & Iron Co. has declared a dividend 
of 2Vo% on its preferred stock. This is the first dividend 
paid since 1908 on the preferred shares, on which 8% per 
annum is guaranteed. 



Mining in France 



Paris Correspondence 

A statement has been issued by M. Pechadre, who was 
delegated by the budget committee of the French Cham- 
ber to draw up a report respecting French public works. 
The chapter devoted to mining wealth contains a good 
deal of Interesting information concerning the present 
raining situation in France. He describes the mining in- 
dustry as one of the most prosperous of the nation. There 
are 1483 concessions covering an area of 1.200,000 hectares 
(one hectare equals 2.471 acres), all which concessions, it 
is said, are being actively exploited. 

The annual output of the minerals in France is esti- 
mated at 945,000,000 francs value. This includes quar- 
ries, but does not refer to Algeria, which is included in 
many statements, at times leading to confusion in respect 
to France proper. The number of workmen engaged in 
mining is 350,000. 

The number of coal and lignite concessions is 641, of 
which 298 are being exploited. The principal centres for 
the production of coal are the well known Nord and Pas 
de Calais, which furnish between them about 67% of the 
total coal production of France. There are other coal 
centres of local importance, such as the Loire, the Gard, 
Saone-et-Loire. L'Aveyron et le Tarn, and finally there 
are the Bouches-du-Rhone and the Puy-de-D6me et l'Al- 
lier. The production of coal in France is increasing. 
Nevertheless, the country is unable or is not equipped to 
produce the quantity necessary for its consumption, and 
it is obliged to import coal from England and sometimes 
from Germany and Belgium ; to the latter countries it 
returns the compliment by exporting fuel to districts con- 
venient to its source of supply. 

Of the ironfields of France the principal centres are 
the Meurthe-et-Moselle, where over 50 mines are worked. 
Then follow Normandy and Anjon, where considerable iron 
deposits have been discovered ; and. finally, in the Pyrenees 
high-grade iron ore is produced and is used for special 
purposes. It may be mentioned in connection with the 
Normandy deposits that the Germans realize their im- 
portance and have established large plants there to sup- 
ply the lack of iron ore in Germany, and when these 
are well advanced France will become a large exporter 
of iron ore. As to other minerals, except gold and 
one or two others, the situation is not so satisfactory. 
France has some 90 mines of various minerals such as 
iron pyrite, manganese, antimony, copper, lead, zinc, and 
silver, which produce a value of about 20,000,000 francs 
of mineral of various kinds. Most of them yield but 
small profits, except the zinc and iron pyrite, which, on 
the contrary, have paid well. 

Gold-mining is improving. A number of companies 
were formed with success at Lucette (Mayenne). Bel Here 
(Maine-et-Loire). and Chatelet ( ("reuse). Encouraged by 
the results, many prospectors continued the search in 
districts such as Aurieras and St. Sulpice-Lauriere, where 
numerous veins have been discovered, and concessions are 
being applied for from the Ministry of Public Works. 
There are 41 concessions for salt mines and brine wells, 
where about 250.000 tons of refined salt, 115,000 tons of 
crude salt, and 490.000 tons of salt in solution is produced, 
the last named for the production of soda. 

There are now 190 applications before the Ministry of 
Public Works for mining concessions. 20 of which are 
for coal, 70 for iron, 38 for gold, 20 for salt, and 42 
sundries. The statement appears at a time when the min- 
ing laws of France require revision : in favor of the 
miner on the one hand, while the Government appears 
desirous of getting more revenue out of them, on the 
Other, While the matter of revision remains unsettled, 
little mav be said; but enough is known outside the re- 
port to confirm a couleur de rose view of the coal and iron 
situation, particularly of the latter, in the east near the 
German frontier and in the north in Normandy; the revival 
of the gold industry also promises well. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



45 



Churn-Drilling in Shaft-Sinking 

By Tom McCormac 

Churn-drilling has long been practised, and is a most 
common method of drilling any soft rock, particularly in 
surface work. In these latter days of the almost universal 
use of compressed air and machines for drilling purposes, 
churn-drilling has not been used with the frequency that 
is justified by the results which can be obtained from its 
use. In hard rock the method cannot compete with the 
power-drivei' drill, but in shaft work most excellent re- 
sults have been obtained in the softer rocks. Chief among 
the advantages of churn-drilling is the fact that in any 
ordinary shaft drilling can be started within ten minutes 
after the broken rock from the previous round has been 
cleaned up. The hole drilled, furthermore, is large, and, 
when loaded, the powder lies well toward the bottom, where 
it can do the best work. And not least of the advantages 
of the drill is the fact that anyone can operate it. 

In sinking through any soft rock the churn-drill will 
compare most favorably with the air-driven piston drill. 
In speed of drilling it is even the faster in some cases, 
since no time is consumed in the unproductive work of 
'setting up' and 'tearing down.' It has the further advan- 
tage of requiring no expense for power. While no par- 
ticular skill is required in its operation, still the hard work 
involved in its use makes a careful selection of the drilling 
crew imperative. A good active workman will accomplish 
twice as much drilling as will a man only a little less 
energetic; while in the hands of poor men, churn-drilling 
would probably fail entirely. Churn-drills may be had in 
a great variety, ranging from the elaborate outfit used in 
testing placer ground to the simple bar of steel sharpened 
at each end. 

I am indebted to W. H. Storms 1 for several of the ideas 
which I used successfully in sinking a two-compartment 
shaft through a firm but soft shale; but I was first induced 
to try the drills by Martin Empey, an able miner at Ely, 
Nevada. In this shaft it was the usual routine for four 
men to drill 10 holes from four to five feet deep, and 
blast in four hours. No piston drill could compete with 
the churn-drill in this class of rock. I used the common 
%-in. drill steel sharpened on each end and in 7 and 9-ft. 
lengths. Should deeper holes be desired, I would advise 
the purchase of bits fitted for 1-in. pipe and which can be 
obtained from any dealer in mining machinery; these can 
be attached to pipe of any convenient length. The shape 
of the bit is of more importance than in hand drilling, 
and it should be carefully made, rather strongly forged, 
exactly gauged, and tempered very low. A churn-drill is 
not intended for hard rock, and a low temper — almost a 
blue — will give the best results. 

Usually a hole was started with a hammer and drill, 
all hough there were times when the rock was soft enough 
to auger a short distance, and at other times an old 'gun' 
or 'bootleg' would be cleared out and made to serve as 
a short hole in which to start churning. Until a hole 
reaches a depth of a foot or IS in., the drilling- goes rather 
slowly; after that it goes surprisingly fast. Up to a 
depth of three feet the hole can be cleaned if necessary 
with an ordinary machine 'spoon', but a deeper hole can 
be more quickly cleaned with the device described by Mr. 
Storms — a bar of %-in. iron with an eye welded in the 
end through which can be drawn an old rope yarn or a 
piece of rag. This, dropped into the bottom of the hole, 
is withdrawn and wrung out. and the operation repeated 
until the hole is dry. Should there be too much water, 
it can be removed by using a piece of *4-in. pipe bent 
over at the top and using one hand at the top for the 
valve, or it can be removed by using the sand-pump. A 
simple form of the latter is a pipe having- the bottom 
drawn to a small opening which is closed with a steel ball, 
held from being thrown out of the pipe by a pin a short 
distance above. Plenty of old sacks for 'mop rags' are 

I'Timbering and Mining,' p. 141. 



needed, and a couple of tin cans, without bottoms, will 
occasionally be found useful for casing the top of a large 
hole. 

One of the most frequent causes of trouble in drilling 
with the churn-drill is the encountering of caving or ravel- 
ing ground. In such case the supply of drilling water 
must be kept as low as possible, in the hope that the 
thick mud will plaster the sides of the holes. If a drill 
should break, it can usually be loosened in the hole and 
fished out with the scraper, or it can sometimes be made 
to adhere to a chunk of mud or clay on the end of the 
loading stick or scraper. The bar magnet, suggested for 
this work, would, I am afraid, prove to be far too inter- 
esting a plaything to be permitted in a shaft. 



Copper Producers' Association Report 

The Copper Producers' Association statement, July 8, 
shows a decrease during the preceding month in accumula- 
tion in this country of 5,280,639 lb. The details are as 
follows : 

Pounds. 

Stock of marketable copper of all kinds on hand 

at all points in the United States, June 1, 1912 49,615,643 
Production of marketable copper in the United 
States from all domestic and foreign sources 

during June 122,315,240 

Deliveries for consumption, June 66,146,229 

Deliveries for export, June 61,449,650 

Stock of marketable copper of all kinds on hand 

and at all points in the United States, July 1 . 44,335,004 
The changes in surplus .since July 1, 1911, have been as 
follows, in pounds. 

Increase. Decrease. 

July, 1911 19,695,306 

August 4,297,357 

September 7,453,355 

October 5,897,214 

November 23,212,454 

December 22,330,493 

January, 1912 22,173,252 

February 3,301,944 

March 572,431 

April : 2,927,829 

May 15,450,386 

June 5,280,639 



Gypsum mmed in 1911 amounted to 2,323,970 short tons, 
valued at $6,462,035, as stated by E. F. Burchard in an 
advance chapter on gypsum from 'Mineral Resources for 
1911,' published by the U. S. Geological Survey. This was 
a slight decrease from the figures for 1910 — 1.05% in pro- 
duction and 0.94% in value — but while the industry was 
not especially active, certain changes, such as the replace- 
ment of old mills by a smaller number of larger modern 
mills and the establishment of mixing plants in commercial 
centres, should result, according to Mr. Burchard, in the 
saving of freight charges on finished plasters and enable 
the products to be sold to the consumer at low rates. Gyp- 
sum was produced in 17 states and in Alaska from 78 mills. 
The imports for 1911 were considerably reduced. 



Mineral deposits of importance in Turkey are those of 
emery; chromite, copper, and marble. Great supplies of 
marble in matchless varieties of color are found on the 
coast of the Sea of Marmora and elsewhere, most of them 
unworked. Eski Shehr practically supplies the entire world 
with meerschaum. The work of mining is still pursued in 
the most primitive fashion with picks and knives. The 
oulput goes almost entirely to Vienna, the average annual 
value being about $300,000. Why American dealers should 
buy meerschaum in Vienna instead of at the production 
point is not apparent. Turkey has many hot and mineral 
springs, the most famous being those at Brusa and Tiberias, 
which only await foreign capital to gain renown among 
the health resorts of the world. 



4(i 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



El Porvenir Mine in the District of Mallama 



By P. P 

In almost all the mines in the southern part of Colombia 
the ore is genetically related to volcanic action. In the 
case of the El Porvenir mine, it is connected with the 
most important volcano ever existing in South Colombia, 
the Gualcala. This volcano, at present extinct, was 
active until a recent geological epoch. The last lava How 
from Gualcala was an augite andesite, which I have called 
propylite in my Spanish writings on the subject. After- 
ward the volcano ejected Only breccia and mud. To this 
breccia I ascribe the origin of the ore deposits, and for 
that reason I call such material madre (mother of the 



MAP OF COLOMBIA. 

formation) , During its last convulsions, the Gualcala vom- 
ited only tuff. 

My experience in the mines of this territory permits 
the following general conclusions: 

(a) The metalliferous deposits of the region had a com- 
mon origin. 

(b) The ore-bearing formation is the breccia ejected from 
the volcanoes. 

The mineral-carrying waters of these muddy eruptions 
percolated through the mass of the breccia to impregnate 
the subjacent rock, filling at the same time the crevices, 
fissures, joint places, and cleavage cracks, so as to form 
the want us, stringers, and networks of ore characteristic 
of the mineral formation here. 

(c) The actual orebodies have been formed by reconcen- 
tration under the influence of surface waters. 

El Porvenir mine is one of the most appropriate, in 
which to study the genesis of the deposits which charac- 
terize the Narino department, and for this reason I have 
selected it for a brief description, in which to summarize 
the principal features of the petrology (and economic 
conditions) of the locality. 



'. Gamba 

Situation and General Relations 

El Porvenir mine is one of a group of concessions 
owned by a native company named Compafiia Minera de 
Mallama. and it is the only one which has been much ex- 
plored. The group consists of 30 pertenencias of BOO by 
240 metres each. El Porvenir is near the peak Gualcala 
and beside the crater on the west or Pacific slope of the 
Cordillera which trends north-south. 

It is a noteworthy fact that all the big craters here 
open to the west, and therefore the most important out- 
How of lava was in that direction. 

The altitude of the workings is .i4l)l) metres ( 11.100 ft.) ; 
mean temperature, 7°C. ; the climate very healthful. 

The distance to (iuabo, a village on the highroad to 
Harbacoas. is three and a half kilometres. The distance 
from (iuabo to Harbacoas is 11(1 km., a three-days journey 
on muleback. Barbacoas is the river post on the Patia 
river, and is one day's steamer travel from Tumaco, the 
seaport. The distance to Tu<|uerres. the local centre for 
provisions, is 50 km. Excellent native labor is available, 
the peons making good miners and millmen. The wages, 
reduced to American currency, are as follows: Peons. l(i 
to 20c. with board costing 26c; carpenters and blacksmiths, 
66c. with board costing 36c. ; millmen, monthly. $0.09, with 
board at the same rate as the carpenters. The miners prefer 
contract work. They are hard workers, intelligent, and par- 
ticularly courageous. When contracting they earn an aver- 
age of 60c, and then demand the same board as the millmen. 

Timber for underground use is cheap — $1.6() 1 per cubic 
metre; squared or sawn timber costs .$32 for the same 
measure. The explosive employed here, and in almost all 
the mining enterprises in southern Colombia, is 'rackarock.' 
Its advantages in transportation, freedom from import 
duty, make it_ preferable in a country like this. The cost 
of freight is: Tumaco to Barbacoas, 40c per bulto 2 ; Bar- 
bacoas to Guabo, $1.(50 per bulto ; Guabo to Porvenir, 32c. 
per bulto. For heavy pieces the cost is very high. The 
currency is silver at 250% exchange rate against United 
States currency. 

Ore Deposits 

The ore is found along the contact between two erup- 
tives; monzonite (locally called ijranito) and propylite (an 
amphibole augite andesite called pnla i-erde). The ore is 
not confined to one of the two eruptives, but extends into 
both rocks. The monzonite (with all the transitions from 
true syenite to granite) forms the basement of the metal- 
liferous belt that runs south for more than 150 km. along 
the western slope of the cordillera. It appears in all 
the mines of the mining districts of Mallama and Sama- 
niego. The propylite is an eruptive characteristic of the 
Gualcala zone and peculiar to the mining district of Mal- 
lama. Covering the monzonite and propylite is a thick 
bed of volcanic breccia formed by cemented fragments of 
propylite and on this are layers of tuff. The ore de- • 
posit is in a system of east-west parallel veins and veinlets, 
which at the same time is more or less parallel with the 
line of contact, having, therefore, some stringers in the 
propylite which lies south of the contact, and others in 
the monzonite which lies north of the contact. Occasion- 
ally, as the veins pass from one rock into the other, they 
are on the contact itself. Some of the stringers or narrow 
veins are very irregular in strike, and form lenticular 
masses deposited in the joint planes. Outside of this, as 
the rocks are broken by cleavage into parallelopipeds, all 
fine cracks have been penetrated by the solutions, and the 
rock itself, principally the monzonite, has been impregnated 
and metasomatically replaced by ore. The individual 
lenses of ore are from 0.10 to 1.60 m. thick and very 

'All values reduced to U. S. currency. 

-The bulto (bundle) weighs 100 to 130 pounds. 




July 13, 1912 



MINING AND SCIENTIFIC PRESS 



47 



variable. They are separated by layers of metamorphosed 
country rock, averaging a half metre in thickness. The 
lode is known to be nearly 100 m. thick and is exposed by 
superficial cuts for 1200 metres. 

The main fault runs north-south, cutting the lode, and 
at the intersection is an open pit connected with under- 
ground workings. The inspection of the walls in the open- 
cut shows clearly the manner in which the orebody was 
formed by the descending waters that percolated through 
the bed of breccia. At the same time, all stages of the 
process of metamorphism of the country rock into ore 
may be seen. 

The most abundant mineral, and the last to be deposited, 
is mispickel. It is followed in order of quantitative im- 
portance by pyrite, blende, chalcopyrite, and galena. The 
accessory minerals are tellurides (whose existence is known 
by the H.,S0 4 reaction), sulphides of silver, native silver, 
and gold. 

In the gangue may be distinguished stringers of quartz, 
solid sulphides, and altered country rock. 

The ore contains some free gold, too fine to be dis- 
tinguished with the magnifier. All the minerals mentioned 
are accompanied by gold and silver, but the richest ore is 
pyrite. The average value of the ore is nearly $30; for 
the pyrite it is $150 to $238. The altered country rock 
assays $9 per ton. 

The workable ores can be classified as follows: (a) sul- 
phides, 5% of the whole, with an average value of $200; 
(ft) quartz and metamorphosed rock, 10% of the whole, 
with value of $20; (c) impregnated rock and saprolite, 
85% of the whole and value of $9. The ratio of the gold 
to silver by weight is 1 : 6. 

At present El Porvenir mine is only a promising prospect. 
Early this year a 3-stamp Krupp mill was erected, the 
stamps weighing 550 lb. They drop 7V 2 in., 75 times per 
minute. Though the ore generally shows no colors in the 
pan, it pays well in the mill. The plates are 1 by 3 m. 
in size. The capacity of the mill is from 4 to 5 metric 
tuns per day. When running on rich ore and pyrite the 
yield of amalgam is 400 to 1000 gm. per 24 hours. From the 
poorest ore the yield is 4(1 to SO gm. The amalgam, by 
reason of the climate, is hard. It must lie cleaned carefully 
with hot water, tor it encloses large quantities of sulphides; 
its product in bullion is 22% of 700 fineness. The mill is 
driven by a 18-in. Pelton motor with 40-m. head and water 
consumption of 7 litres per second. Below the plates is a 
mercury trap, followed by two wooden spitzkasten. The 
rich sand is carefully collected for future treatment. The 
slime is run to the creek. 

The additional plant now in erection included a common 
reverberatory furnace for dead roasting, with capacity of 
2 metric tons per 24 hours, and a cyanide plant for per- 
colation treatment of the roasted material. All of this 
equipment is home-made of wood. My experience with 
the roasted sand is that a recovery of 95% can be made in 
30 hours. The plant is erected practically at the mine to 
avoid the transportation of the ore which, in a country 
like Colombia, is the most difficult and expensive part of 
mining. The ore, from the open-cut, costs in the mill, all 
expenses included, $0.30 per metric ton. The milling adds 
$0.68. From underground the ore costs $2.50 per ton de- 
livered in the mill. As a rule the sulphides are sorted out 
by hand and carried to special dumps to be treated after- 
ward or shipped to the establishment of the Gualcala 
Mines Co., which is near by. If the road to Barbacoas 
was made suitable for freight wagons the rich pyrite' could 
be shipped to the United States at good profit; unfortun- 
ately the freight cost at present is prohibitive. 

Worked as a low-grade mine El Porvenir could be made 
a big producer. The financial condition of the owners 
oblige them to work on small scale, practising coarse con- 
centration and throwing into the waste all ore lower than 
$10 in value. Practically 85% of the whole is not now 
treated. Similar conditions exist in the case of many mines 
in the vicinity where the same kind of concentration is 
practised. An enormous amount is thrown away, but the 
owners obtain nice profits. 



In the course of the next six months the present plant 
will be enlarged to 9 stamps, ordering two batteries more 
from the same maker; the Krupp machinery has given the 
highest satisfaction, the design being such as to make it 
easily transported, and the erection of the steel frame being 
rapid and easy. The development of the mining industry 
in this part of the Republic will be slow if things con- 
tinue as they are at present. Few people, and those with 
only limited capital, are interested in mining. To put 
things all right, and to bring the country up industrially 
to the level warranted by its mineral resources, it is of 
the utmost importance that people and capital come into 
the country from outside. 

The only large foreign mining concern existing at pres- 
ent here is the Gaulcala Mines Co., an American enter- 
prise. This company owns a great area of mineral land 
and has just erected a modern cyanidation plant in this 
same mining district. The ore is similar to those described, 
but the orebodies are quite different. They take the form 
of fissure veins rather than that of an impregnation as is 
I In' case of the Fl Porvenir mine. 



Gold Deposits of Gibbonsville, Idaho 



By Francis Church Lincoln 

Gibbonsville is situated on Dahlonega creek, just above 
its junction with the North Fork of the Salmon river, in 
Lemhi county, Idaho. Until recently the nearest railroad 
point was Divide, Montana, 86 miles distant on the Oregon 
Short Line, and all freight and mail came from there by 
way of Wisdom in the Big Hole basin, and thence across 
the continental divide into Idaho. The new Pittsburg & 
Gilmore railroad now has a terminus at Salmon, Idaho, 36 
miles from Gibbonsville, and mail comes by this shorter 
route, although, on account of excessive freight rates, some 
freight still comes by way of Divide and Wisdom. The 
Gibbonsville region, comprised in the Dahlonega mining 
district, has produced a large quantity of gold from both 
placers and lodes, but unfortunately only fragmentary 
records of its history and production are available. The 
property upon which the greatest amount of work has 
been done is that of the American Development, Mining & 
Reduction Co. This ground is credited with a production 
of $1,500,0(10. The mine has changed hands several times, 
spent five years in the hands of a receiver, and lost a 30- 
stamp chlorination mill by fire. It is now equipped with a 
new 30-stamp cyanide plant, and, although work is at pres- 
ent suspended, timber has been ordered for a new 500-ft. 
shaft, so its activities may be expected to commence this 
summer. 

Several other mines in the district have made notable pro- 
ductions. Among these may be mentioned the Clara Mor- 
ris group belonging to the Largey estate of Butte, and the 
McCarthy, both north of the A. D. M. & R. mine; the Corn 
Beef group, belonging to the O'Rourke estate of Butte, and 
the Anderson group, to the west; and the Twin Brother 
group belonging to Henry Seligman, of New York, to the 
south. Not one of these properties, however, has ap- 
proached the production of the A. D. M. & R. They have 
all been lying idle for a number of years, but the coming 
of the railroad to Salmon has stimulated mining in Lemhi 
county, and this stimulation has begun to be felt at Gib- 
bonsville. As a result, 0. P. Zortman secured a lease on 
the Twin Brother group last summer and began to develop 
that property; Messrs. Edwards and Roberts purchased the 
Anderson group; work has commenced on the McCarthy; 
and the Butte claim-holders are considering the further de- 
velopment of their properties. No placer properties are in 
operation at present. Guy Stapleton, of Butte, has many 
of these under option, and last summer made an unsuc- 
cessful attempt to drill the North Fork. 

The hills in the vicinity of Gibbonsville are well wooded 
with spruce and yellow pine, and ranching is profitable 
wherever the creek bottoms attain sufficient width. The alti- 
tude of the town is 5400 ft. by aneroid barometer. From 
the creek bottoms the hills rise steeply for about a thousand 



48 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



feet. To the northward, the mountains of the continental 
divide make a great semi-circular sweep with an eight-mile 
radius ahout Gihbonsville as a centre, and across the divide 
lies Montana. At Gihbonsville, Dahlonega creek llowing 
west is augmented by Anderson creek Mowing south, and 
turns southward, entering the North Fork of the Salmon 
river just below the Twin Brother group at the southern 
end of the mineral district. 

The principal country rock is slate. This has been briefly 
described by W. H. Weed. 1 The slate includes quartzose, 
idiopathic, and micaceous facies, and its structure varies 
from thinly to thickly laminated. The strata have a gen- 
eral north-south strike, and dip steeply to the east. No 
fossils were observed. The beds are probably of Algonkian 
age, and possibly referable to the Prichard slate of the 
Coeur d'Alene, in which the gold veins of that district 
occur.- The only other sedimentary rock in the region is a 
quartzite over a hundred feet in thickness which is exposed 
on the west side of Dahlonega creek in the northern part of 
the district, and has been taken up by Mr. Hughes as a 
lode claim. This quartzite is interesting because it contains 
gold. I obtained an assay of 40c. per ton in gold and was 
credibly informed that assays of $1, $2, and in one instance 
even as high as $8, had been obtained by disinterested par- 
ties. As there are no marked signs of secondary miner- 
alization, the quartzite may represent an ancient placer. 

At one point in the high placer west of Anderson creek, 
a small patch of decomposed granitic rock outcrops in the 
slate. It is an eroded knob of earlier age than the slate, 
and probably is Arehean granite. A great dike of basic 
rock extends down Anderson creek to its junction with 
Dahlonega creek and then follows Dahlonega creek to its 
junction with the North Fork, down which it extends for 
an undetermined distance. This dike is narrow on upper 
Anderson creek, widening gradually to a thousand feet at 
Gibbonsville. The rock of which it is composed consists 
of large white crystals of feldspar with a dark background 
of ferromagnesian minerals free from olivine. Another 
dike of gabbro occurs west of the North Fork near its 
junction with Dahlonega creek, and a third dike of like 
character forms the crest of the continental divide on the 
trail from May creek, Montana, to Gibbonsville. These 
dikes appear to be similar to the diabase dikes and sills of 
the upper St. Joe river basin, south of the Coeur d'Alene 
district. 3 and may be approximately contemporaneous with 
them. Several small pegmatite dikes were observed in the 
gabbro where exposed in the bedrock of the Anderson creek 
high placer. 

Numerous north-south faults occur. Within the slate 
these are marked by narrow clay seams and have caused 
but slight displacements, but at the slate-gabbro contact 
east of Anderson creek there is a brecciated fault-plane 
which indicates a much greater movement, and the Twin 
Brother adit discloses not only this contact fault, but also 
a number of parallel, brecciated fault-planes within the 
basic dike. These facts taken in conjunction with the oc- 
currence of granite and quartzite on the west side of the 
Anderson creek dike only, point to a very considerable up- 
throw of the major portion of the dike and of the region to 
the west of it. 

The Gibbonsville gold ore occurs in fissure veins in the 
slate. These veins are said, on good authority, to extend 
into the gabbro in some instances, and fissure veins which 
probably belong to the same system certainly do occur in 
the Anderson creek dike, but as yet no ore has been mined 
from veins in the igneous rock. The ore-bearing veins were 
probably formed by hot ascending waters circulating in 
fissures produced subsequent to the consolidation of the 
gabbro. It is possible that the gold was derived by the 
leaching of the auriferous quartzite previously described. 
The productive belt in the neighborhood of Gibbonsville 
has a length of about two miles in a general north-south 
direction, and a width of about half a mile. The veins 

iTJ. S. Geol. Surv. Prof. Paper 27 (1904), p. 90. 
=Ransome and Calkins. V. S. Geol. Surv. Prof. Paper 62 
(1908), pp. 29 and 141. 
»J. T. Pardee. U. S. Geol. Surv. Bull. 470 (1911). p. 47. 



within this belt all appear to belong to the same system. 
They have a general east-west strike, cutting across the 
Stratification of the slate. Their dips are steep, and in all 
cases save one are toward the north. They are narrow but 
fairly persistent, and in some instances can be traced for 
the length of several claims. Post-mineral faulting on a 
small scale is extremely prevalent. The faults are gen- 
erally pivotal in character. The greatest displacement 
observed was 25 ft. The ore-shoots vary in width from a 
few inches to a few feet, and are rarely over 2 ft. wide, 
although in one instance a width of 12 ft. is said to have 
been attained. They are frequently several hundred feet in 
drift length. The barren intervals between shoots are of 
variable length. So far as known, all the ore-shoots pitch 
toward the east, the direction of the dip of the slate. 

The ore in the narrow fissure veins of Gibbonsville is 
high grade, ranging in value from $20 to $200 per ton. 
Some rich ore occurred in the shallow oxidized zone. The 
gold was free there, but the sulphide ore below is base. 
The principal ore minerals are quartz, auriferous pyrite, 
and chalcopyrite. The vein filling varies from nearly solid 
pyrite with a slight admixture of quartz and chalcopyrite 
to almost solid quartz with a few scattered cubes of pyrite 
and specks of chalcopyrite. East of the Anderson creek 
dike the copper content rarely exceeds 0.5%, but west of 
the dike it is much higher. Examination with the naked 
eye shows that the pyrite retains its own Crystal outlines 
when imbedded in the quartz, and that the quartz keeps 
its shape when in chalcopyrite. but that the chalcopyrite 
only shows crystal faces when it occurs on the interior of 
vugs. The order of formation was therefore (1) pyrite, 
(2) quartz, and (3) chalcopyrite. 

These later-formed particles of chalcopyrite may be 
the result of secondary concentration by cold descending 
waters. In this case, the percentage of copper is the 
measure of secondary concentration, and, if the erosion 
has not been too rapid, also proportional to the amount 
of erosion. Thus the high copper content of the veins 
west of Anderson creek is explicable on the ground that 
there has been a greater amount of erosion in that locality. 
This conclusion is home out by the structure, which has 
been shown to indicate an up-throw of that section. A 
slight secondary silver enrichment in the upper portions 
of the orcbodies is suggested by the fact that in 1890 Mac- 
Donald 4 reported 99% gold and 1% silver by value in 
the ore, while last summer my assays of samples which 
probably came from greater depths than MacDonald's, 
showed only traces of silver. Native gold has been occa- 
sionally observed in small specks in the oxide ore, but 
in the sulphide ore the gold occurs disseminated in the 
pyrites. The iron pyrite is rich, the copper pyrite is poor, 
and the quartz practically barren. The relative gold con- 
tent of these minerals is shown by the following assays 
of fairly pure material selected from a single sample. 
Mineral. Oz. Gold per Ton. 

Pyrite 2.68 

Chalcopyrite 0.18 

Quartz 0.01 

Placer deposits occur in both terrace and creek gravels. 
One terrace occurs west of Anderson creek near its junc- 
tion with Dahlonega, and another west of North Fork near 
its junction with Dahlonega creek. These terraces were 
formed by the present streams at an earlier stage in their 
history. The placer gold is very pure, having a value of 
$18 per ounce. It is nearly all coarse, small nuggets of 
from $3 to $10 being common 2 , and occurs in worn particles 
which are usually free from quartz. It is evident that 
this gold cannot have been derived from the local lodes, 
since particles of the lode gold are fine, while particles of 
the placer gold are not only coarse, but also show by 
their abraded surfaces that they have come from a dis- 
tance. Placer gold of the same character is found across 
the continental divide in Montana on Hughes creek, a 
tributary of the Bitter Root river and on May and Pio- 
neer creeks, branches of Trail creek, a tributary of the 
*Eng. <£ Min. Jour. 62 (1896). p. 319. 
»D. Maguire. Mines and Minerals 19 (1899), p. 277. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



49 



Big Hole river. The placer gold in all these localities 
appears to have been derived by reconcentration from an 
ancient river bed, probably of Neocene age. 

The conditions are, on the whole, favorable to raining. 
Owing to lower elevation, the climate is much less rigor- 
ous than that of the adjoining parts of Montana. The 
slate drills and breaks easily. Little timbering is required, 
and when supports are necessary, a good quality of timber 
can be obtained within the district. There are a number 
of small water-powers which can be developed at small 
cost. One of these is now being used by the A. D. M. 
& ft. mine to run its air-compressor, and another to 
run its mill. The only adverse conditions are the nar- 
rowness of the veins and the high freight rates. The 
usual method of mining is to strip the hanging wall of 
a vein and bar down the ore. 

In the early days of the camp the free-milling surface 
ores were treated by amalgamation in arrastres and stamp- 
mills. As the ores became more basic it was found nec- 
essary to employ chlorination, and MacDonald has de- 
scribed the plant erected by the A. D. M. & R. company 
for this purpose. That mill was burned and the new one 
erected by the same company employs cyanidation. The 
ore is crushed by stamps through 45-mesh screen and 
the free gold removed by amalgamation on plates. The 
pulp is then concentrated and the concentrate cyanided. 
A series of tests that I made showed that there is no 
free gold in the deeper ores, and that in order to obtain 
an extraction of 90% by cyanidation it will be necessary 
to slime them. 



Regeneration of Cyanide Solution 



By W. D. Williamson 

In 1899 while treating cupriferous tailing in North 
Queensland, the excessive cyanide consumption, due to the 
presence of copper carbonates, made profitable treatment 
exceedingly difficult. Solutions rapidly fouled, precipita- 
tion was very unsatisfactoi-y, and extraction decreased until 
the only alternative was to discard the fouled solution 
and make up fresh solution. Changes of solution were 
very frequent and involved considerable expense and loss 
of time. This trouble was finally overcome by preliminary 
leaching with sulphuric acid, about 12 lb. of acid being 
used per ton of tailing treated. Later, when sulphide ore 
had to be treated, sulphuric acid leaching was useless. 

Experiments made on solutions, which had become 
charged with copper, demonstrated the fact that a very 
considerable saving of the combined cyanide could be 
effected by the addition of sulphuric acid to the solution, 
in sufficient quantity to precipitate all the copper as 
Cu u (CN) — namely: 

Cu,(CN) 2 2KCN + H 2 SO, =-, Cu 2 (CN) 2 +KJ30, 4- 2HCN 

The insoluble Cu„(CN)., was separated by filtration, and 
the clear filtrate containing the HCN neutralized with a 
slight excess of alkali. 

The experiments were sufficiently encouraging to induce 
me to continue the method on a working scale. As solu- 
tions became overcharged with dissolved copper, sulphuric 
acid was added to the sumps in sufficient quantity to com- 
plete the above reaction. The precipitated Cu,(CN) 2 was 
settled, and the clear supernatant liquor was drawn off 
and neutralized in a separate sump, and was then used 
as a fresh clean cyanide solution. The settled Cu 2 (CN),, 
was collected and saved for shipment to smelter. The 
possible recovery of the cyanogen in combination with the 
copper as Cu 2 (CN) 2 still gave me material for experiment. 

Heating with acid I consider impracticable, as it would 
involve distillation of the liberated HCN, and probably 
excessive loss of cyanogen, owing to the decomposition 
of the cyanogen radical in the presence of heat and strong 
mineral acids. Eventually I found that an almost com- 
plete recovery of the cyanogen in Cu 2 (CN) 2 could be ob- 
tained by suspending the Cu 2 (CN) 2 in water, and passing- 



sulphuretted hydrogen when the following reaction takes 
place : 

Cu 2 (CN) 2 + H 2 S = Cu 2 S + 2HCN 

The insoluble Cu,S was separated by filtration and the 
clear filtrate containing the HCN neutralized with alkali. 

Finally, I combined the two operations by adding to the 
cupriferous cyanide solution sufficient Na 2 S, to precipitate 
all the copper present, afterward adding the requisite 
amount of sulphuric acid to complete the following reac- 
tion: 

2KCN.Cu 2 (CN), + Na„S -f 2H.SO, = Cu 2 S + 4HCN 
+ Na 2 SO, + K 2 SO< 

The precipitated Cu 2 S carries down with it the precious 
metals contained in the solution and is collected, dried, 
and shipped to smelter. The clear liquor is decanted or 
filtered, and sufficient alkali added to combine with the 
free HCN liberated by the previous treatment. 

This process, which theoretically should recover all the 
cyanogen in combination in cupriferous cyanide solutions, 
has never been used to my knowledge on a working scale, 
but in laboratory experiments as high as 90% of the 
combined cyanogen has been regenerated and made avail- 
able as a clean copper-free cyanide solution. 

Commenting on this method, Andrew F. Crosse said: 
"Some years ago I was engaged in investigations in the 
cyanide treatment of cupriferous ore near Pilgrim's Rest. 
During my experiments I found that the solutions were 
always highly charged with copper, and I was unaware 
that anyone else had the idea of treating cupriferous cya- 
nide solutions with sulphuric acid. I made many experi- 
ments. It was difficult at first to find out exactly the 
right amount of acid required. Then I made a long series 
of experiments to find out how much gold and how much 
silver was precipitated. I never obtained 100% of gold 
by precipitation; I used to get, if I remember rightly, 
88 to 97%. I think that nearly all the silver was precip- 
itated, but not quite all the copper. It was a very nice 
precipitate to* handle; it would settle very easily. I treated 
over a ton of solution in this way. I then regenerated 
the hydrocyanic acid solution, after decantation, by means 
of caustic soda. 

"The second part of Mr. Williamson's paper is cer- 
tainly an improvement on what I did. I simply took the 
precipitate, dried it, calcined it, and melted it, and I got 
a little bar containing about 95% of copper, 1% of gold, 
and 2% of silver: but I certainly think that where sul- 
phuric acid can be obtained fairly cheaply, and where a 
certain amount of cyanide is decomposed by copper in 
the ore, the method is worth considering. Supposing 
some gold does remain in solution, the solution is simply 
passed through the zinc-box after regenerating with caustic 
soda. — Journal Chem., Met. & Min. Soc. of South Africa. 



The high and increasing prices of tin during recent years 
has naturally led to attempts to find and open up new tin 
districts, particularly in the United States and in British 
Africa. But the totals contributed by these new sources 
are hardly yet appreciable; the production in Nigeria, for 
example, in the first four months of this year probably did 
not reach 350 tons of metal — quite an encouraging output, 
of course, but not calculated to affect the price on the Lon- 
don market. The American production so far has been 
negligible. For all practical purposes the world's supply 
of tin is still provided by a very few older localities. It 
is remarkable, indeed, how few and circumscribed these 
areas are ; a southern province of China, the Straits Set- 
tlements, two small Dutch islands in the Malay Archipelago, 
the eastern coast of Australia, Tasmania, Bolivia, and Corn- 
wall — these were all, though now there must be added South 
Africa, which last year provided about 2000 tons. 



The New Chucuitambo Gold Mines, near Cerro de Pasco, 
Peru, produced 29 kg. of gold during March, and it is 
expected that the cyanide plant will soon further increase 
the production. 



50 



MINING AND SCIENTIFIC PRcSS 



July 13, 1912 



Dry Concentration of Placer Gold 



By F. J. H. Mkrrill 



Tlie recovery of gold by dry concentration from placer 
gravel, and from various ores, is a subject which has re- 
ceived much attention in arid regions, where water is too 
scarce or too expensive to be used in the ordinary pro- 
cesses. Inventive minds have for years been occupied with 
dry concentration in all its phases, and many machines 
have been devised to separate the precious metal from the 
associated rock fragments. Several have been built which 
effect a satisfactory separation on trial runs with selected 
material, but comparatively few have been made which, in 
continuous use, give good results on material varying in 
coarseness and in gold content, and sunn' machines, other- 
wise good, are lacking in durability. 

The fundamental principle of concentration, with either 
air or water, is to partly overcome gravity in the particles 
under treatment by an upward flow of the fluid used, and, 
through what is known as 'hindered set t ling.' to effect a 
classification of the fragments by the differences in their 
specific gravities and thus facilitate the separation of the 
gold from the valueless material mingled with it. The 
physical differences between air and water render their 
action in concentration somewhat different. The cohesion 
between the mineral fragments and the medium used is 
less with air than with water. This permits a more rapid 
settling of the fine particles, but in dry concentration it is 
observed that small particles frequently adhere to larger 
ones, probably through some electric influence. Particles 
of great difference in specific gravity differ in speed 
less in air than in water, and the effect of the greater 
density of water can be counterbalanced in using air. by 
giving it greater velocity, for. in jigging, air permits more 
pulsations per minute than water. , 

As there are several distinct types of concentrators 
using water, so are there several using air. In most of 
these an air current is used having a velocity greater than 
the free-settling velocity of the lighter material, conse- 
quently most of this is blown out of and away from the 
machine, leaving behind the gold, the other minerals of 
high gravity and the coarser particles of minerals of 
medium gravity. 

The most elementary form is the batea or wooden pan. 
In using this the air-blast is supplied by the lungs and the 
implement is manipulated with rotary and other motions 
which gather the heavy material toward the centre, while 
distributing the lighter material toward the margin whence 
it is blown away. The air-blast is varied in force accord- 
ing fo the material to be removed and. toward the last, the 
residue of valueless material is separated from the gold by 
clever manipulation and blown out of the batea. 

Next in order is the common Mexican 'dry washer.' a 
most efficient machine, said to have been introduced by 
Hungarians about 1850, and extensively used in northern 
Mexico. This consists mainly of a tray about I 1 •> by ft., 
with muslin bottom and 5 cross-riffles resting, at an in- 
clination of about 15°, on a frame, beneath which is a 
canvas bellows. The latter forces through the muslin an 
intermittent blast of air which drives away most of the 
fine light material. The gravel is fed through a hopper 
upon the upper end of the tray and is moved slowly down 
the slope by the jar id' the bellows stroke. As the op- 
eration proceeds the gold lodges on the riffles, chiefly be- 
hind the two uppermost, and the material of lower specific 
gravity flows on over the riffles and gradually passes out 
of the machine at the lower end. The slope of the latter 
is increased, when necessary, by blocking up the rear legs, 
and an inclination of 2">° is frequently used. 

A machine of this class is usually operated by two men. 
The common mode of procedure among Sonora gambu- 
rinos is for the men to spend the morning in mining. One 
digs out the gravel, while the other turns the windlass if 



a shaft is used, or carries out the gravel with a wheel- 
barrow if working in an adit. As the pay-dirt is taken 
out, it is spread in the sun to dry. all boulders and stones 
ill appreciable size being removed. After a nooning, the 
two treat the dirt in the machine. One turns the wheel 
operating the bellows, adapting the force of the blast to 
the material, while the other feeds dirt into the hopper, 
carefully watching its progress over the riffles. When the 
latter appears to be as well loaded as may be consistent 
with safety, the bellows is stopped, the tray is removed, 
after loosening the wedges which hold it in place, and the 
concentrate is transferred from the tray to a batea. where 
further concentration and cleaning of the gold is done. 
This machine is thoroughly efficient in the hands of skilled 
workmen, who are not difficult to obtain. The loss of gold 
in the tailing is small. The chief loss is in gold so fine 
that it is blown away with the quartz dust, but the amount 
Of this is usually not great. When built of substantial 
size, with a tray about 2 by 4 ft., or 2^2 by ") ft., these 
machines are quite efficient, and, with local labor, entirely 
satisfactory for limited operations. 

The chief advance in the development of this type of 

machine is an air-jig, put on the market s e eight years 

ago by Steele. Sutton & Steele, of Dallas, Texas. In this 
the stationary tray is replaced by a revolving table or belt 
about li ft. wide, with riffles about 8 in. apart and screened 
with muslin. This is inclined about 30°, the slope being 
adjustable. The operation of this machine is identical with 
that of the Mexican 'dry washer,' except that the operation 
is continuous, and as the fine is driven away by the in- 
termittent bellows blast which passes through the muslin, 
the riffled belt raises the concentrate to the top of the 
machine and. passing over, dumps it into a box af the rear. 
In an extended trial of four of these air-jigs, on placer 
gravel in Sonora. Mexico, I found them very efficient in 
recovering the gold. A serious difficulty, however, was a 
lack of durability and a tendency to get out of adjustment, 
which made it necessary at frequent intervals to stop work 
for repairs. If this machine were perfected, as it un- 
doubtedly can be, it would be most valuable. 

The Curtis machine, made in Denver, Colorado, uses a 
continuous blast id' air from a fan. As usually constructed, 
each unit consists of a trough-like box, semicircular in 
vertical section and covered by a perforated plate, some- 
what less than an inch thick. The perforations are semi- 
circular in cross-section, and about an inch in diameter. 
They are partly (dosed beneath by wire gauze, which allows 
the air-blast to pass but retains the concentrate. The 
boxes, which are usually set in pairs on a frame, have a 
gentle inclination and receive lateral agitation from a cam. 
The pay-dirt is fed upon the upper end of the plate and, 
as it passes down the slope, the fine material is blown 
away and the concentrate is caught in the holes or recesses 
which serve as riffles, the tailing escaping at the end. To 
(dean up. the machine is stopped and the plate is rotated 
on a longitudinal axis, dumping the concentrate into the 
trough below, from which it is removed. The machine has 
made good recoveries on some material, but requires closer 
sizing than one-eighth inch. 

Another type is the Shumway concentrator, made in Los 
Angeles. This consists of a shallow wooden box. covered 
with thin canvas through which a continuous air-blast is 
forced by a fan. Over the canvas, wire netting of about 
half-inch mesh is laid. By means of cams the box. which 
is slightly inclined, is agitated laterally and the dirt fed 
upon the canvas, at the fop of the incline, passes down the 
slope, leaving the concentrate in the meshes of the wire, 
while the tailing falls to the ground. To recover the con- 
centrate, the operation of this machine must be suspended 
and the table tilted for cleaning up. It has done good 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



51 



work under favorable conditions, but it also requires finer 
sizing than one-eighth inch. For a time it was used in 
the Little Florence mill at Goldfield, Nevada. 

The Jardine concentrator, made in San Francisco, is the 
result of a diligent effort to construct a durable machine 
which is continuous in operation and does not stop for 
cleaning up. The air-blast comes from a fan, but is made 
intermittent by a rotary valve. The shallow box which 
serves as an air-chamber is interrupted across its length by 
riffles of parallel metal plates with intervening slits which 
guide the concentrate down into cylinders 
in which worm conveyors rotate, conducting 
the gold and heavier materials to a trough 
at one side. Between the riffles, the sur- 
face of the table is formed of a cotton- 
clot h screen, through which the air-blast 
passes. Lateral agitation is provided and, 
as the dirt passes down the sloping table, 
the fine light material is blown away. The 
concentrate caught by the riffles is de- 
livered into the trough at the side, and t lie 
tailing passes away at the end of the table. 
A machine of much efficiency has recently 
been devised by A. H. Stebbins, of Los An- 
geles. This, in general form and act ion, 
resembles closely a Wilfley table. The sur- 
face and the riffles are formed from sheet 
metal, the latter being about 1 in. apart. 
Air is introduced beneath the table in a 
continuous blast from a fan, and readies 
the bed of dirt through minute perfora- 
tions in the metal surface of the table. 
These perforations, which are as close to- 
gether as possible, are rectangular and 
about *4 in. long and l /„ to */ M in. wide. 
The longer axes of these slits stand at 
about 45° to the direction of the riffles. 
The form of the slit gives the air-jet an 
inclination of about 10° above the surface 
of the table, and the air-sheet formed by 
these jets flows with the dirt in its descent 
along the slope. It is stated by the in- 
ventor that material as coarse as V2 in. can 
be treated on this machine, which appar- 
ently is destined to be quite successful. 

The total number of machines devised 
for this work can probably be reckoned by 
hundreds. Most of them have been short- 
lived. Those mentioned above are a few 
of the most promising which have come to 
my attention. To successfully solve the 
problems of the dry concentration of placer 
gravel, the machine employed must meet 
several conditions, and, on the other hand, 
certain conditions are necessary in the ma- 
terial to permit any machine to work suc- 
cessfully. The concentrator must be capa- 
ble of working effectively on material of 
all sizes up to Yg in. This mesh has been 
determined for many localities in Sonora, 
as one which will allow most of the coarse 
gold to pass through with the fine. Should there be much 
coarse gold present in the gravel, the screen must be 
made proportionately coarser, and the concentrator must 
work on coarser material. Primarily the pay-dirt treated 
rmist be dry. Average uncemented placer gravel as it 
.fecurs, even in the dry climate of Sonora, is usually 
too moist, when mined, for immediate treatment. The 
gambucinos, working on a small scale, dry their dirt 
by spreading it in the sun. To do this on a large scale 
would invite theft. In many cases it is necessary to pro- 
vide mechanical drying, but this involves no serious diffi- 
culty in labor or expense. Cemented gravel usually car- 
ries less water than that which is uncemented, but it re- 
quires crushing and screening to bring it into the required 
condition for treatment. The heat generated in the pul- 



verizer serves to remove the small amount of moisture 
present. 

The gold in the cemented placer gravels does not occur 
within the pebbles, boulders, and rock fragments, but on 
their surfaces, being practically all included in the cal- 
careous cement which unites them. The first step in treat- 
ment must, therefore, be the separation of the barren rock 
fragments from the gold-bearing cement and the pul- 
verizing of the latter. This is done with great efficiency by 
the Quenner pulverizer, which consists of a revolving 




DRY CONCENTRATION PLANT, BOLUDO. 




DRY CONCENTRATION PLANT NEAR LLANO, SONORA. 



trommel or barrel of steel staves with a shaft rotating in- 
dependently within and carrying chain hammers. These 
hammers effectively break up the calcareous cement and 
leave the cobble-stones and pebbles with nearly clean sur- 
faces, to be ejected at one end of the barrel, while the pul- 
verized cement escapes through the quarter-inch spaces be- 
tween the staves. Thus in many localities the material 
subjected to dry concentration for the recovery of the gold 
is only about one-half of the total mined. Credit for the 
invention of this machine is claimed by Joseph Lusignan, 
a French Canadian living in Nogales, Arizona, and a man 
of much mechanical ingenuity and skill, but Mitts Quenner, 
a Sonora miner, exploited the machine commercially and 
profited by his business shrewdness. 

Concentration with air introduces a detail which does 



52 



MINING AND SCIENTIFIC PRESS 



July L3, L912 



not have to be considered in using water, as a cloud of tine 
dust rises from the dry concentrator, which is very irritating 
to the eyes and lungs. The best way to dispose of this is 
to cover the table with a hood, which catches the dust and 
delivers it to an exhaust fan. As most of the fine dust is 
blown out of the dirt near the upper end of the table, it is 
unnecessary for the hood to cover the whole of the latter. 
Sullieient of the lower end may be left uncovered to give 
a view of the action of the machine. 

Dozing the past four years I have attentively studied 
various methods of dry concentration in work carried 
on under my own supervision and in operations conducted 
by others, and my observations convince me of the com- 
mercial practicability of this treatment. Thus far. the 
Mexican 'dry washer' is the only machine which has been 
successfully used in treating dry placer gravel on a com- 
mercial scale in Sonora. Several other machines of small 
capacity have been used in individual enterprises with 
some success, but up to the present time no one has made 
a continuous demonstration in practical operation of any 
of the newer types of dry concentrator, yet undoubtedly 
some one of thorn will soon be perfected and will prove 
efficient. A machine made by J, M. Wishart, of Pasadena, 
is being used on the border of the Mojave desert near Vie- 
torviile, but I have not yet seen it. It is not probable 
that, in concentration, air will compete with water where 
the latter may be freely obtained, but dry concentration is 
necessary for the recovery of millions of dollars in sold 
lying in the Tertiary and Quaternary gravels of the arid 
areas of Sonora. Arizona. New Mexico, California, and 
Nevada. At but few points do these placer deposits occur 
in sufficient extent to justify the expense of erecting plants 
for pumping water long distances, but, in a hundred or 
more of them, there is sufficient gold to justify an ex- 
penditure of from $5000 to $15,000 for equipment. Most 
of these, with careful management, will give ample return, 
while a few will yield substantial fortunes. 



Short-Circuiting in Anode Tanks 



By A. R. Ledoux 

Some years ago the head of one of the most important 
electrolytic refineries in the United States was puzzled to 
discover the cause of certain short-circuits. He noticed 
that an accretion started at the anode and grew always 
from one side of the anode toward the cathode until it 
had completed a short-circuit. The works ran north and 
south, and this short-circuiting was always from the west 
toward t he east. The manager came very near making a 
statement before a scientific society that the revolution of 
the earth must have something to do with this short-circuit- 
ing, as it always was in the direction from the west toward 
the east; but one day he broke off one of these fingers 
which ran across, and found, at the point where it l>egan, 
a little splinter of wood. He broke off others and found 
the same thing; and, to make a long story short, the rea- 
son was just this: The anodes, which were heavy, were 
brought into the factory, unloaded from a car and dumped 
by the men on a block of wood alongside of the tank. 
They did it always the same way; the corner of the anode 
always struck the wood at a certain inclination, and little 
splinters of the wood were broken off and adhered to the 
bottom of the anode. When the anode was put into the 
tank (always in the one way), that splinter served as a 
starting point for a short-circuit, and that was the simple 
solution of something that had been bothering them for 
more than a year. When they substituted a rubber mat 
for a wooden block, the trouble ceased. — Ihtllctiii of the 
A. 1. M. E. 



Copper ore and pyrite valued at $2,1)10.000 was pro- 
duced in Norway in 1911. Nearly all of this was ex- 
ported and the chief value was in pyrite, the copper being 
valued at $470,000. Some 4000 people are engaged in 
mining this ore. 



The Cuyuna Iron Range 



By Kirby Thomas 

More than 2U00 drill-holes have been sunk in the Cuyuna 
iron district of Minnesota in the past five years to find 
and explore the bodies of iron ore which were hypothetically 
located by Cuyler Adams from assumptions based on cer- 
tain disturbances of the magnetic needle in the region. 
The whole area is covered with a glacial mantle from 50 to 
1110 ft. thick, and there are no rock outcrops to give any in- 
dication of the formation of ore within many miles of the 
ore bodies now being disclosed. It is true that about 1S90, 
R. D. Irving suggested that the iron-bearing formation 
should be found in the approximate region of the Cuyuna 
district, basing his suggestion on the obvious relation be- 
tween the Keewenawan erup>tive beds forming the vast 
Lake Superior synclinal trough and the older and under- 
lying sedimentary beds in which several of the Lake Su- 
perior irou formations occurred, and later C. R. Van Hise 
and C. K. Leith, of the U. S. Geological Survey, more 
definitely accepted the hypothesis and mapped a projection 
of the iron-bearing formation approximately in the line 
of the later discovered Cuyuna deposits. It now develops 
that these hypotheses were only correct as applied gen- 
ially, for the Cuyuna deposits seem to be rather related to 
the Crystal Falls. Michigan, area geologically, than direct 
extension of the Mesabi formation or correlating with the 
l'enokee-Gogebic formation, a matter of academic interest. 
The purpose here is to present the method and results of 
the exploration after once the orebody was found and the 
factors in the interpretation of the large amount of data 
made available from drilling and lesser amount from the 
underground work. 

The first drill-holes were sunk on the lines of maximum 
magnetic attraction, which had been platted with fair ex- 
actness. The results were disappointing, for the cores 
showed only lean schist with magnetite. With a knowledge 
of the general geology of the Lake Superior deposits, this 
information was significant, if not definite. Other drill- 
holes were sunk to the south at right angles to the line of 
the maximum attraction, and ore was found. This ore was 
hematite, and hence did not itself affect the magnetic needle, 
but the facts from these first drill-holes furnished the key 
to a new and important iron district, and added many 
millions of tons to the discovered ore reserves of the Lake 
Superior region. Further drilling disclosed that the ore 
was not in flat blanket-like bodies as on the Mesabi, but 
was in beds dipping from 60 to 70° to the southeast with 
the general rock formations of the area, and, in fact, form- 
ing part of the rock formations structurally. It was then 
further determined that the ore in depth changed to iron 
carbonate, mostly, representing the unaltered iron forma- 
tion member of the geologic series, and that the orebodies 
were not continuous along the strike, but were lenses or 
interrupted parts of the beds coming to the erosion surface. 
Other approximately parallel lenses or beds were disclosed 
by more drilling on both sides of the magnetic schist 
member. Evidences of a pitch or hade of the orebodies 
was also present, indicating a complex folding to form the 
trough and saddle-shaped orebodies characteristic of the 
synclinal and synclinorial ore structures. Another range, 
so called, to the north was later found by drilling on the 
magnetic indications, and this was found to include several 
parallel beds. The whole disclosure so far indicates a 
broad system of folding of iron formation and the genesis 
of iron orebodies from the iron-bearing members ai 
physically favorable places. It was also determined that 
eruptive dikes and bosses intercepted the sedimentary iron 
formations in places, and it was anticipated that these 
eruptive formations would have a bearing on the ore- 
bodies. All this was worked out before any shaft was sunk 
to give visible confirmation of the theories based on the 
drill data. 

Most of the drill-holes were sunk vertically, but later, 
when it was determined that the orebodies had a regular 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



53 



pitch to the southeast, angle holes to cut the beds at right 
angles were driven, with the result of checking the data 
from the vertical holes and giving a basis for the calcula- 
tion of tonnage and definition of the limits of the orebodies. 

Now half a dozen shafts have been sunk to the ore, and 
the district is a reality, but its discovery was due to a mere 
theory and its first proof wisely placed drill-holes. The 
■work of exploration was in the hands of men familiar with 
the general iron formation of the region and with drilling, 
and competent geologic talent was always at hand to guide 
and to interpret the facts. The district has been proved 
for more than 35 miles along the formation, and an iron dis- 
trict potentially as important as any one of the others 
in the Lake Superior region has been found. 



Alumina as a Drying Agent 

By F. M. G. Johnson 

In the course of an investigation on phosphonium com- 
pounds a drying agent was necessary which would suc- 
cessfully diy both PH 3 and HI or HBr, since P 2 3 proved 
useless for this purpose. Satisfactory results were obtained 
by employing A1 2 3 prepared by igniting the hydroxide 
at a low temperature. A test of the efficiency of this 
substance to take up moisture was made by passing air 
saturated with water vapor at room temperature, about 
18°, through a tube containing about 7 gm. of the oxide, 
and then through a second tube filled with P,0,. The 
air was led through at the rate of about 2 or 3 bubbles 
per second. Both tubes were weighed from time to time. 
The somewhat remarkable result obtained was that the 
P 2 0, tube showed no perceptible gain until the A1 2 0, had 
increased about 18% in weight, corresponding to the for- 
mation of the hydrate Al 2 3 .H.O. The reaction is gen- 
erally represented by the equation 

Al,0 3 + H 2 0±=?2A10(OH) 
The formation of the hydrate is accompanied by evolu- 
tion of heat, hence increased temperature causes its dis- 
sociation into A1,0 3 and H 2 0. It is thus seen that 1 gm. 
■of A1 2 3 can practically completely absorb all moisture 
from approximately 10 litres of air saturated with water 
vapor at 18°. G. P. Baxter and R. D. Warren investi- 
gated the drying properties of CaBr.,, ZnBr.., and ZnCL, 
and their results show that compared with A1 2 3 these 
substances are much inferior as desiccating agents. A1 2 0., 
is also more effective than H 2 S0 4 . A tube filled with A1 2 3 
-can be used for an indefinite period, if from time to time 
it is heated with a smoky flame while air, previously led 
through H.,S0 4 , is passed through it. To replace the usual 
P 2 5 tube used in connection with mercury pumps it ap- 
pears particularly suitable, since the tube used need never 
be renewed. A small tube of P 2 5 following the Al.,0., 
would serve to indicate when the A1 2 0„ needed reheating. 
Its uses in many investigations are obvious. — Journal Amer. 
■Chem. Society. 

Production of manganese ores in 1911, according to 
E. F. Burchard, of the U. S. Geological Survey, was 2457 
long tons, valued at $24,586, a slight increase over the 
figures for 1910. The ore was mined in California and 
Virginia. The importation of manganese ores continues 
to greatly exceed the domestic production, and will prob- 
ably continue to do so as long as the principal sources 
of foreign supply are abundant and cheaply worked, and 
ocean freights are low. In 1911 the imports were 176,852 
long tons, valued at $1,186,791, a decrease of 65,496 tons 
as compared with the importations for 1910. This de- 
crease in the demand for manganese is attributed to the 
depression in the iron and steel industry. 

Tin production of Bolivia in 1911 amounted to 24,000 
tons, as compared with 22,S55 tons in 1910 and 21,340 tons 
in 1909. 

Coal deposits have been discovered in Neuquen territory, 
Argentina, by a Government expedition. 



The Coal Supply of Manchuria 



By Edward di Villa 

The only coal mines of importance at present worked 
in Manchuria are the Fushun mines. These mines rank 
among the largest in China, with an average output of 
about 4000 tons per day. From October 1908 to August 
1911 the exports from this mine amounted to 349,577 tons, 
of which Japan received 17,844 tons, Korea 101,276, China 
210,332, Europe 4251, the South Seas 15,811, and America 
3 tons. The coal seam is 130 ft. thick. The mine is 
situated close to Mukden, and a glance at the map of 
Manchuria will show that this mine can command the mar- 
ket of practically the whole of South Manchuria. The 
output of the mine is to be raised to 2,000,000 tons per 
year. The area of Manchuria is 400,000 square miles, and 
the population is about 13 millions, of which 6 millions 
are under Japanese influence. 

Manchuria may be roughly divided at present into three 



COALFIELDS OF MANCHURIA. 

parts. The northwest is under Russian influence, and 
wood is the principal fuel used, even on the Chinese East- 
ern railway. The southern terminus of the Russian rail- 
way is at Kuanchengtze. From Kuanchengtze south 436 
miles to Dairen the railroad is operated by the Japanese, 
and coal from the Fushun mines is used. The eastern 
part is still somewhat Chinese. The natives chiefly burn 
dry corn stalks and other refuse vegetation. A line is 
now in course of construction from Changchun to Kirin. 
This is a joint Chinese and Japanese undertaking, and 
coal is the fuel used. Unfortunately for the Chinese, the 
only place from which they can purchase their coal is 
from the" Fushun mines, which are entirely Japanese. In 
ease of any trouble between the Chinese and Japanese, the 
coal supply of the railway would naturally be stopped. In 
order to remedy this sad lack of foresight on the part of 
the Chinese Government at Peking, I spent three months 
in Manchuria examining the geological conditions in the 
vicinity of the new railway line. The length of the line 
is 84 miles, the ground is undulating, with a small range 
of hills to be crossed about half way. Five suitable places 
were discovered whei - e coal-mining might at present be 
profitably started. 

Among these, the most advantageously situated is one 
in a district called Huo-shih-shan, about 30 miles east 
of Changchun and one mile from the line of the Kirin- 




.54 MINING AND SCIENTIFIC PRESS Juiy 13, 1912 



Changchun railway. The land surface between the mine 
site and the railway line is nearly level, and is such that 
a branch line two miles long could be constructed with 
maximum gradients of 1%. The gradients on the K. C. 
K. are 1%. Some seams of coal outcrop in a small range 
of hills having a due east and west trend. The natives 
have worked the coal to a small extent, confining their 
operations to the surface. The hand specimens obtained 
are semi-anthracitic, tending toward bituminous varieties, 
contain some occluded gases, and are inclined to be shat- 
tered. 

The hist seam of coal is overlain by a corse-grained grit. 
This grit is very interesting, as it is similar to the grits 
overlying the Carboniferous formations of the northern 
coalfields of England. Another grit, similar to the above, 
is finer grained. The upper grit is composed of practically 
pure quartz, with a few glistening scales of muscovite mica, 
and in a matrix of kaolin, the quantity of kaolin exceed- 
ing that of the quartz. The lower grit has a larger per- 
centage of kaolin, about 05 to 70. The quartz is angular 
and sharp, and viewed under the microscope is full of 
fluid cavities. In the upper grit, needles of tourmaline 
are of frequent occurrence. This grit is probably a de- 
composition product of granite. The quartz crystals show 
no sign of abrasion. The sizes of the crystals vary from 
1/15 inch in the upper grits to 1 125 inch in the lower 
grits. These grit^s are not very hard, and in places they 
contain some very thin seams of coal of light grayish odor. 
The thickness of the upper grit is .'10 to 40 ft.; under this 
occurs a seam of coal 5 ft. in thickness. Next follows 
the finer grit, which has very fine clay partings and is 
2 ft. thick; then comes a seam of coal 7 ft. thick. T 
have no doubt that there is more coal underneath, as there 
is no marked change in the character of the rock underly- 
ing the last seam of coal mentioned. 

I was able to trace the seams of coal for several miles, 
but did not manage to collect any fossils, as these do not 
interest the natives. I promised to reward them for any 
fossils they would bring me. The district around is very 
poor and land very cheap. Labor would cost about f*0.50 
per day average. Water is not abundant in the district; 
there are. however, two small creeks nearby. In the vil- 
lages wells nearby the depth tc water is 30 to 40 ft. Tim- 
ber is abundant. There would be an excellent market 
for coal in the neighborhood for the railway and up to 
Harbin. The selling price in Kirin and Changchun would 
be about $5 small coin (say $2) per ton of 2240 lb. I 
was unable to remain in this district as long as I should 
have liked, as I had to return to Tientsin on the outbreak 
of the revolution in November 1911. Under proper man- 
agement these mines could be profitably worked, and with 
no small advantages to the railway. 

Electric Pig Iron Production at Trollhattan 

The electric furnace for the production of pig iron, at 
Trollhattan in Sweden, has been i l operation for eight- 
een months, and the results of operations during a 215- 
day continuous run have recently been made public by 
J. A. Leffler and E. Nystrom. The iron ore used aver- 
aged 61% Fe for the run and was fed to the furnace at 
the rate of 24.5 tons per day, together with 6 tons of 
charcoal (containing 73% carbon) and 1.8 tons of un- 
bumed limestone (54.3% CaO). The daily production of 
pig iron was 15 tons, the power consumption per ton of 
pig iron being 1482 kw., and the electrode consumption 12 
lb. per ton of pig. The average composition of the pig 
iron for the period was: C, 3.046%; Si, 0.725; Mn, 0.477; 
S, 0.0126; P, 0.02%. The e.m.f. on the furnace was 73.6 
volts, and the current 11.423 amperes. The output of 
iron per kilowatt -year was 3.94 tons. The gases are drawn 
off at the top of the furnace and forced in again at the 
tuyere level, thus earning the heat up the shaft to effect 
reduction; one-third of the heat generated is thus trans- 
ferred. Many problems of operation still remain to be 
solved. 



Litigation at National 



We present below a sketch of the ground at National, 
Nevada, now in dispute between the National Mines Co. 
and the Charleston Hill National Mining Syndicate. The 
first named company is the owner of the West Virginia 
No. 1 claim, from which extremely rich ore has been mined 
in the past two years. The company claims the apex of a 
vein bifurcated at the north, as shown, but continuing ta 
the end of the claim as indicated. On the other hand, the 
Charleston Hill Syndicate claims a fault line as indicated 
from e to g, and that the apex is from a to d on the sur- 
face and from d to f underneath the fault plane. Accord- 
ing to this contention, the southern two-thirds of the 'apex' 
of the vein is really the apex of a fault later in time than 
the fissure in which the National vein is found. It is also 



i 




WEST VIRGINIA' No. I 

CMAKLC2TO/V MILL. NATIONAL MINING SY/YO/CATE 



claimed that the fault cuts and dislocates the National vein- 
The two fissures are extensively developed by underground 
workings, and the fact that the drifts run without break 
from the recognized National vein into and along the fault 
claimed, is admitted. It is also true that the valuable ore 
has been found in the workings north from the intersection 
of the vein and the fault. It was at first maintained by the 
experts tor the National company that there was no fault,, 
but in later testimony doubt was thrown on this and em- 
phasis placed upon the period of mineralization, which was 
held to be contemporeanous in the 'vein' and the 'fault,' 
making the whole one continuous vein. The case is still in 
process of trial. The experts for the National Mines Co. 
include Messrs. H. V. Wine-hell, A. N. Winchell. H. L. 
llollis. W. H. Wiley, and others, while for the Charleston 
Hill Syndicate the principal experts are Messrs. Albert 
Burch and A. C. Lawson. 



Massive, finely granular rhodonite occurs at many locali- 
ties in California, and some of them have yielded gem 
and ornamental material. The different deposits yield a 
similar product, the chief difference being in richness of 
color. Black manganese oxides are associated with much 
of the rhodonite, filling seams and cracks, and make pretty 
contrasts with the junk. Probably the best gem material 
so far found has come from the Wheeler prospect, about 
nine miles north of Happy Camp, in Siskiyou county, but 
good material has been found near Taylorsville. in Plumas 
county, and other localities. These rhodonite deposits are 
associated with sedimentary rocks and occur along belts 
of manganese-stained slates and quartzites. 



Furnaces at the plant of the Han-Teh-Ping Iron & 
Coal Co. at Hankow. China, are now in operation again 
and it is expected that full operations will be resumed this 
month. 

Nitrate exports from Chile for the past four months 
of 1912 paid taxes amounting to $9,830,130, as compared" 
with $8,471,050 in 1910. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



55 



Discussion 



Readers of the Mining and Scientific Press are invited to 
use this department for the discussion of technical and other 
matters pertaining to mining and metallurgy. The Editor 
welcomes the expression of views contrary to his own, be- 
lieving that careful criticism is more valuable than casual 
compliment. Insertion of any contribution is determined by 
Its probable interest to the readers of this journal. 

Smelting and Refining Zinc-Box Precipitate 

The Editor: 

Sir — In your issue of March 2, M. W. von Bernewitz has 
an interesting article on the treatment of matte and sul- 
phur refining, but I am by no means convinced that the 
method of smelting the matte with cyanide and borax is 
the most convenient or best. Lately I have not had any 
matte to handle, having come to the same conclusion as 
Mr. von Bernewitz, that it is a nuisance and that its for- 
mation is best avoided, but, some time since, I did a good 
.deal of sulphur refining, of which the following are typical 
examples : Crude bullion from cyanide clean-up, weight 
171.7 oz. Assay value: gold, 518.5, equivalent to 89.03 oz. ; 
silver, 264.2, equivalent to 45.37 oz. ; base, 217.2, equivalent 
to 37.30 oz. This bullion was now melted, keeping the heat 
as low as possible, in a 30 'salamander' crucible, and 15% 
of its weight of sulphur added, stirring with a salamander 
rod. The large crucible was used to give plenty of surface 
and to avoid loss through spitting. The use of a small clay 
crucible inverted over the sulphur, described by Mr. von 
Bernewitz had been previously tried and abandoned, as it 
was thought the action was too violent and that some gold 
•was lost by spitting. 

The resulting bullion weighed 92 oz., assaying: gold, 
813.9, equivalent to 74.878 oz. ; silver, 139, equivalent to 
12.788 oz. ; base, 47, equivalent to 4.324 oz. The resulting 
matte, weighing 93.8 oz., was smelted in a hot fire with 
iron, no other addition being made except a little borax. 
The resulting bullion weighed 49.4 oz., assaying: gold, 
301.4, equivalent to 14.8 oz. ; silver, 548.2, equivalent to 
26.9 oz.; base, 150.3, equivalent to 7.7 oz. The resulting 
matte weighed 51.8 oz., assaying: gold, 16.45, equivalent to 
0.52 dwt. ; silver, 10%, equivalent to 5.18 oz. ; copper, 35%, 
equivalent to 18.13 oz. The matte was not treated further, 
but shipped to the smelter with the slag. It will be seen 
that the bullion assays do not agree exactly, owing to the 
difficulty of getting a fair average sample of the low-grade 
bullion by boring; it should have been sampled by dip 
samples. 

The net result of the sulphur refining was to reduce the 
base metal from 37.3 to 12 oz. and to lock up 5V2 oz. silver 
and V!> dwt. gold in the matte. The following is a sum- 
mary of this and of two other lots of bullion treated in a 
similar manner : 



no pulverizing of the matte being required, and cheaper, no 
cyanide and but a very little borax being needed. 

Not being satisfied with the sulphur treatment, I thought 
that if the precipitate were slightly roasted before acid 
treatment, in order to oxidize and render more soluble the 
base metals, a residue would be left containing little base 
metal, and smelting charge would be reduced. This was 
found to be the case, with the additional advantage that 
there was no foaming, as no hydrogen was evolved, less 
acid was required, as part of the zinc was volatilized, and 
any white precipitate was decomposed by the roast and 
rendered more soluble. On the other hand, there was the 
possibility of loss of precious metals in roasting. I was 
skeptical as to there being any serious losses, but to de- 
termine the matter to my own satisfaction, I made the fol- 
lowing experiments. A difficulty in carrying out work of 
this class arises from sampling, it being almost impossible 
to get accurate samples of such rich stuff; however, all 
reasonable precautions were taken and six determinations 
were made to reduce the chance of error as far as possible. 

After roasting or treating with acid, the samples of pre- 
cipitate were fluxed as follows: precipitate, 100 parts; 
litharge, 50 parts; borax, 50 parts; soda, 25 parts. The 
slag was then cleaned by smelting with more litharge and 
iron, and the lead bullion cupelled, and assayed. The pre- 
cipitate experimented on was from the treatment of an 
old slime dump and was essentially low grade. 

Experiments on Short Zinc 

Au, gm. Ag, gm. 
la 500 gm. ppt. after roasting yielded. . . .11.84 10.51 

lb " " " acid treatment 12.14 11.06 

2a " " " roasting 7.77 7.26 

2b " " " acid treatment 9.69 8.22 

3a " " " roasting 6.92 5.95 

3b " " " acid treatment 8.43 7.02 

Average loss by roasting: gold, 12.3%; silver, 9.9%. 
The apparently smaller loss of silver was probably due 
to some being dissolved by the sulphuric acid. 

Experiments on Fine Precipitate 

Au, gm. Ag, gm. 

4a 500 gm. after roasting yielded 15.10 13.02 

4b " " acid treatment 13.97 14.59 

5a " " roasting 10.84 10.52 

5b " " acid treatment 11.08 10.53 

6a 1000 gm. " roasting 40.02 37.94 

6b " " treatment with lead ace- 
tate to replace zinc and 
smelted without either 
acid treatment or roast- 
ing 43.14 42.50 

Average loss of gold by roasting, 3.3%; silver, 8.8%. 
Here the loss of gold by roasting is much redilced, but 





Bullion, 


Au, 


Ag, 




oz. 


% 


% 




171.50 


51.85 


26.42 


After first S treatment 


92.00 


81.39 


13.90 




49.40 


30.14 


54.82 






0.05 


10.00 


Crude bullion 


238.00 


46.13 


35.32 




183.75 


59.89 


31.82 


After second S treatment. . 


. . 150.75 


70.49 


25.68 


After third S treatment. . . . 


141.50 


73.54 


23.94 


Bullion from matte 


51.30 


13.24 


72.68 


Residual matte contains.... 




0.027 


13.70 






49.10 


39.70 


After first S treatment 


65.50 


71.22 


25.60 


Bullion from matte 


27.25 


17.96 


72.08 


Residual matte contains.... 




0.05 


12.18 



This shows that the 'iron' method of treating matte is 
effective in recovering gold, but the resulting bullion is too 
base, requiring further refining, and a notable quantity of 
silver is locked up in the matte. It seems to be more 
effective than the cyanide method and is certainly easier, 



Base, 


Au, 


Ag, 


Base, 


S added. 


% 


• - % 


% 


% 


oz. 


% 


21.72 


89.03 


45.37 


37.30 


24 


15 


4.70 


74.87 


12.78 


4.35 






15.03 


14.80 


26.90 


7.70 






Cu 35.00 


0.026 


5.18 


Cu 18.13 






18.34 


109.90 


84.50 


43.60 


24 


10 


8.28 


110.04 


58.47 


15.24 


24 


13 


3.82 


106.26 


38.73 


5.76 


7 


5 


2.51 


104.06 


33.78 


3.56 






14.07 


6.79 


37.22 


7.29 






Cu 33.50 


0.025 


12.35 


Cu 30.15 






11.20 


51.56 


41.69 


11.75 


16 


15 


3.17 


46.65 


16.77 


2.07 






9.95 


4.89 
0.021 


19.64 
5.28 


2.71 







the silver loss is relatively higher, probably owing to 
No. 6b not being acid treated. In the six parcels treated, 
five gave higher results without roasting, and in the case 
of the sixth (No. 4a) the combined weight of gold and 
silver was higher in the non-roasted portion, and it is 



56 



MINING AND SCIENTIFIC PRESS 



July 13. 1!>12 



possible that an error occurred in assaying the bullion, part- 
ing may have been imperfect. Roasting was effected in 
an iron pan over a fire; possibly with a more perfect roast- 
ing arrangement the losses would be materially reduced. 

It seems probable that nearly all the advantages of roast- 
ing before acid treatment could be obtained by subjecting 
the damp precipitate to treatment in a chamber with warm 
air saturated with moisture and a little acid vapor (acetic 
acid would probably be suitable), somewhat on the lines 
of the old Dutch process of white lead manufacture. All 
the metallic zinc and copper would be readily oxidized and 
rendered soluble in dilute sulphuric acid, but it is doubtful 
whether the expense of this preliminary treatment would 
in many cases be justified. 

The dried precipitate, after acid treatment, is in a finely 
divided state, and is specially suitable for smelting with 
an oxidizing flux. My present practice is to smelt with 
MnO,, borax, sand, and fluorspar, obtaining a bullion that 
averages about 3% base metal. The silver is to a con- 
siderable extent carried into the slag, but that is locally 
no disadvantage, as the mint allows only Is. 9d. per ounce 
for fine silver, while the combined bank and mint charges 
are Is. 2d. per ounce, and as the slag has in any case to be 
shipped to the smelter, it is more profitable that it should 
have a high silver content. MnO, acts more energetically 
than nitre, and does not boil up so much, nor does it seem 
so corrosive on crucibles. Bessemerizing by air was first 
tried and patented by Manton. of Menzies, but the cor- 
rosion both of the air-pipes and of the crucibles was ex- 
cessive, and until Rose published his classic paper on this 
method, no really conclusive work had been done to prove 
that there was no appreciable loss of precious metals. 

H. R. Edmands. 

Menzies, Western Australia, May 10. 



Mine-Owners' Liability for Accidents 

The Editor: 

Sir — Among managers of plants there seems to be a 
widespread impression that if the mine manager adopts 
the compensation system he does not relieve himself from 
the possibility of a damage suit undertaken by the work- 
man through a contingency lawyer. It may be well to 
point out the facts in regard to this, as there seems to 
be a good deal of misunderstanding about it. 

The concluding paragraph of section 3 of the Roseberry 
law reads in part as follows: "And where such condi- 
tions of compensation exist for any personal injury or 
death, the right to the recovery of such compensation pur- 
suant to the provisions of this act, and acts amendatory 
thereof, shall be the exclusive remedy against the employer 
for such injury or death, except that when the injury was 
caused ^>y the personal gross negligence or wilful personal 
misconduct of the employer, or by reason of his violation 
of any statute designed for the protection of employees 
from bodily injury, the employee may, at his option, either 
claim compensation under this act, or maintain an action 
for damages therefor." Through the pernicious activity 
of insurance solicitors the most that can be made of the 
phrases "personal gross negligence" and "wilful personal 
misconduct" has been made of them to frighten employers 
from accepting the compensation provisions of the Rose- 
berry act, lest by doing so they undertake to carry their 
own insurance under the protection of the limited liability 
which those provisions afford. 

Nearly all laws relating to this subject, in nearly all 
countries, retain these exceptions for the punishment of 
that relatively small number of employers who do take 
less care of their men than they do of their mules, and 
who need the restraining influence of a possible mulct in 
exemplary damages in retribution of their culpable dis- 
regard for the welfare of their men. The compensation 
laws of Great Britain, and of all of its colonies, preserve 
this right to the injured person as an inalienable right 
of Englishmen to have a personal wrong done them re- 
dressed through the courts, that reparation may be made 



them to the full measure of all that they have suffered. 
Our compensation law has been derived, in the main, from 
the British laws on the same subject. 

On the continent of Europe, and in Germany especially, 
it is a prerequisite to such a suit for damages outside of 
the law of compensation that the guilty employer be first 
convicted of criminal conduct toward his employees, after 
which the injured employee may sue for damages in addi- 
tion to his compensation. But this is all of more academic 
than practical value. Not many employers are guilty of 
personal gross negligence or wilful personal misconduct 
toward their employees. Even in Great Britain, where 
the right of an injured employee to avail himself, after 
the accident, of any remedy he chooses, exists without lim- 
itation, out of 282,000 injuries compensated during 1910, 
only 217 injured persons elected to sue outside of com- 
pensation. 

In view of the exaggeration and general misconception 
of the value of these clauses in the statute. I (and I think 
that my associates on the Industrial Accident Board agree 
with me) am of* the opinion that these provisions should 
be so far modified as to permit the Industrial Accident 
Board, in those cases where injuries have been inflicted 
through the gross personal negligence and wilful personaf 
misconduct of the employer himself and none other, to 
double the compensation benefits or increase them in repa- 
ration for the injury inflicted to not exceeding double such 
benefits, coupled with a provision which will prohibit insur- 
ing against that species of liability. For the punishment 
should be visited upon the employer, and him only. He 
should not be permitted to distribute any loss occasioned 
through his own culpable misconduct either to his industry, 
through insurance, or to the consuming public through an 
increase of price. The penalty should be upon him. and 
sufficiently deterrent in its character to make the unhumane 
employer humane per force in default of innate decency 
and sympathy for his kind in his own makeup. 

So far I have heard of no instance under the law of 
personal gross negligence or wilful personal misconduct 
upon the part of any employer in the treatment of his 
men, although among those outside of the law. many in- 
stances have come to my knowledge where there was gross 
personal negligence and wilful personal misconduct toward 
those who were hurt, after they were hurt if not before, 
and I am fearful that no case will develop under the law 
which will permit a judicial construction of what those 
terms mean. They have been useful mainly to frighten em- 
ployers into taking liability insurance who would otherwise 
have accepted compensation and carried their own insurance, 
and I do not expect them to have any other effect whatso- 
ever. I hope that the next Legislature will so far modify 
these provisions as to make them less of a bogie. 

A. J. Pillsbitry. 

San Francisco, June 21. 



Eiierald is ranked among the few really precious stones 
and by some people is considered the most valuable. It 
has been prized from early times because of its beauty 
and rarity. The number of localities where good gems 
have been found is few, and some of those once known 
have been forgotten. Emeralds found with the mummies 
of Egypt probably came from the mountains along the 
west coast of the Red Sea in Upper Egypt, where ancient 
workings were discovered during the nineteenth century. 
Klines in the Salzburg Alps are said to have been worked 
intermittently for emeralds since the time of the Romans 
to the present. The world's principal supply of emeralds 
has come from South America. They were first brought 
to Europe from Peru by the Spaniards in the sixteenth 
century. None are now found in that country, and it is 
thought that the Peruvians obtained them from Colombia. 
Later two of these were lost, and for many years the 
only mines worked were those near Muzo. Recently the 
lost mines of Somondoco were found on the east side of 
the Andes mountains at an elevation of about 9000 ft. 
above sea-level. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



57 



Special Correspondence 



KALGOORLIE, WESTERN AUSTRALIA 

Horse-Shoe Ore. — Associated Northern Leasing. 

Among important developments, the Horse-Shoe has now 
30 ft. of $6 ore on the No. 4 lode at 2650-ft. depth. The 
Associated Northern is now entirely in the hands of trib- 
uters, it paying the company better to collect royalties 
than to bother with small ore-shoots. The mill is working 
on custom ore and should be able to keep busy for a 
number of years. The fall in price of Ivanhoe shares 
was disturbing, but the bottom levels unquestionably appear 
doubtful. At the Chaffers-Main Reef an interesting bit of 
work is under way in the reclaiming of gold from the 
dump at the roasting plant. It will be remembered that 
some years since an unsuccessful attempt was made to 
treat this material by agitation and filter-pressing, the 
main reason for the failure being the absence of the ex- 
pected gold. The present plan of operation is to break 
the lumpy material in a disintegrator, mix it with water, 
and pump it to a floor which has been laid with tarred 
canvas to prevent leakage into the ground. The clear water 
is drawn off at one corner, cyanide added, and the gold 
precipitated with zinc as usual. Evidently the soluble gold 
will be thus recovered cheaply, but how much is present is 
a question. 

LONDON 

Decline of Smelting Industry of England. — Second 
Sight at the St. Ives Consolidated. 

A few months ago 1 recorded that one of the ten smelt- 
ing plants in Cornwall had been closed, namely, that be- 
longing to the Bolitho family at Chyandour, Penzance. An 
even more important event is the suspension of the Pem- 
brey copper works at Burry Port, South Wales, owned by 
Elliotts Metal Co. It is not the want of enterprise, busi- 
ness and scientific ability, or capital that causes the smelt- 
ing industry to leave Great Britain. The Pembrey works 
belonged to Birmingham people, chiefly the Elkingtons and 
Chamberlains, and the equipment was kept up-to-date, but 
the difficulty of buying copper, lead, and silver ore, matte 
and bullion has gradually increased. The smelting and re- 
fining industries have gone to the mines, and the British 
user of metals can no longer be his own producer. The 
Pembrey works are to be sold at auction next month, and it 
is probable that they will pass to other industries than 
smelting and refining. Probably the few remaining copper 
and lead custom smelters in South Wales will follow suit 
when current contracts expire. As regards the zinc furnaces, 
there is still a good deal of activity, but expansion is unlikely 
owing to labor troubles. 

A month ago I sent some details of the want of real 
progress by the St. Agnes Consolidated, one of the Schiff- 
Dietzsch group of companies operating in Cornwall. This 
week a bombastic circular has been issued relating to the 
happenings at the St. Ives Consolidated, another of the 
group. I cannot do better than quote the words of the 
circular. It relates to a report made by Charles M. Rolker, 
a mining engineer well known in America as the consulting 
engineer of the Natomas Consolidated, and in Russia as 
consulting engineer to the Lena Goldfields. The secretary 
says: "I am directed by my Board to inform you that they 
have received a satisfactory report from Charles M. Rolker, 
embodying his recommendations and views on the future 
probabilities of the company's mines, based on the exhaustive 
examination made by him during January and February 
of this year. In his report Mr. Rolker states that the object 
of the St. Ives Consolidated Mines, Ltd., to reopen these 
mines and, after freeing them from water, bring them to 
a producing stage as far as tin ore is concerned, and to 
search for pitchblende ores in the Trenwith mine, seems a 
justifiable and legitimate undertaking. He further expresses 
the opinion that when the Consols mine is unwatered and 
virgin ground entered, ore averaging 40 lb. black tin per ton 



may be expected within ore-shoot limits, and that 30,000 tons 
of ore of this grade sent to the mill with a 20s. cost per ton 
of ore gives £18,994 profit per year." 

I would draw attention to the extraordinary opinion in 
the above paragraph, fo the effect that an unexplored block 
of ground will provide ore averaging 40 lb. of black tin per 
ton. Some years ago it was said by a popular paper in 
England that John Hays Hammond was such a clever 
engineer that he could appraise the value of a mine without 
seeing it, but are we to believe that Mr. Rolker, who is such 
a precise man, really expressed the opinon that virgin 
ground in a waterlogged mine would yield 40 lb. ore, and in 
sufficient quantity to warrant calculations involving a pro- 
duction at the rate of 30,000 tons per year? Apparently 
the days of Albert Grant, Whitaker Wright, and Horatio 
Bottomley are not over for good and all. 

RHODESIA 

Gold Output. — Gloomy Outlook for Labor Supply. — 
Failure of the Buck's Reef. 

Th gold output of Southern Rhodesia for the month of 
April has been declared at 52,587 oz., of a value of £221,476, 
as compared with 51,072 oz., worth £215,102, in the pre- 
ceding month. Other minerals produced during April 
were : Silver 14,181 oz., coal 13,156 tons, lead 51 tons, and 
chrome-iron ore 6188 tons. But little increase is to be ob- 
served in the gold production, and no really material expan- 



a rhodesian prospect. 

sion of output can be expected until the Shamva at Aber- 
eorn, the Cam & Motor on the Eiffel Flats, the Golden 
Kopfe, the Eileen Allanah. the Falcon, and the Antelope 
enter the productive lists. These concerns have been devel- 
oping for a long while and have developed large tonnages of 
ore. Their advent as producers will have a marked effect 
on the gold output of -the country. Each of these mines 
should be producing toward the end of next year. The 
larger mines of the country which are operating stamp- 
batteries go on in a humdrum sort of way. The smaller 
properties, operated by tributors and small syndicates, are 
the flotsam and jetsam of the industry and while in one 
month increased return may be recorded from these sources 
the succeeding declaration, on the other hand, show a sub- 
stantial decline. 

Much, of course depends on the labor position. So far as 
can be judged, the new Rhodesian Native Labor Bureau has 
not up to the present improved it at all. A serious feature is 
the opposition to the recruiting efforts of the Bureau in 
Northern Rhodesia by the farming community to the north 
of the Zambesi. In northwestern Rhodesia agriculture is 
making slow but steady progress and it is alleged by the 
fanners that the supply of native labor is not sufficient for 
their purposes. One or two meetings have been held 
and vigorous protests have been lodged against the opera- 
tions of the Rhodesian Native Labor Bureau in the northern 
agricultural districts. The path of the Bureau is certainly 
not strewn with roses. The Imperial Government has vir- 




58 



MINING AND SCIENTIFIC PRESS 



July 13. 1912 



lually closed the door to recruiting in Nyassaland. In 
Portuguese East Africa the Bureau has to compete with the 
wealthier organizations of the Witwatersrand. The Trans- 
vaal and other stales of the Union are closed to Rhodesia!) 
recruiters, hut little labor is forthcoming in Southern 
Rhodesia itself, and now the northern territories are agitat- 
ing for the expulsion of the R. N. L. B. Unless more local 
and Portuguese African labor is obtained it is difficult to see 
where the natives necessary to operate the large plants 
starting up shortly will be found. 

The profitable ore reserves of t lie Buck's Reef Gold 
Mines have dwindled to 3650 tons, or only five months' 
supply at the present much-reduced rate of crushing. Re- 
cent development has l>een distinctly disappointing and it 
must be admitted that this property, of which such great 
Things were expected a year or two ago, is a failure. It is 
in many ways regret able that it was ever floated as a lim- 
ited liability concern with the comparatively large capital of 
£150,000. The original syndicate earned large profits but, 
while the Buck's Reef proved itself undeniably to be one 
of the best 'small mine' ventures in Rhodesia, its develop- 
ment and progress never really justified its flotation into a 
large concern with offices in London and Johannesburg, a 
bead office, engineering staff, and all the organization and 
administration of a really big mine. Such a policy has been 
the undoing of more than one Rhodesian venture, and it is 
now all too evident that the name of the Buck's Reef will 
have to be added to the list of misjudged mines. The 
'profit' for the quarter ended March .'$1 was only £752 and 
much of it was eaten up by capital expenditure. In Bul- 
awayo it is freely rumored that the mine is on the eve of 
closing down. 

It is reported that cassiterite has been discovered in the 
vicinity of Selukwe. The statement as yet lacks confirma- 
tion but it is becoming apparent that tinstone occurs widely 
in Southern Rhodesia. The mineral has already been found 
in three wideh separated areas in Mashonaland. and the 
present extraordinarily high price obtaining for tin is 
stimulating search for its ores throughout the whole of 
South Africa. 

AUSTIN, TEXAS 

Development at the Hazel. — Sale of the Bonanza. — 
Notes of Progress. 

Good reports of development work in the Van Horn 
district, west of Alpine, continue to be received. The Hazel 
M. & M. Co. and the Commissioners' Court of Culberson 
county have jointly constructed a good wagon-road from 
Van Horn to the mine. 14 miles. The company has in 
operation a number of gasoline trucks, carrying in sup- 
plies and taking concentrate and the richer ore to the 
railroad. The first unit of the new 100-ton mill is now 
being constructed. The Hazel mine has a record of produc- 
ing .+500.000 worth of ore. Only that which ran 50 oz. 
.silver or' better per ton was shipped. This left a dump 
which is said to contain more than $100,000 worth of ore 
(hat will give an average return of $15 per ton gross and 
a net return of $9 per ton when milled. The company 
which is now preparing to resume operation of this mine 
on a large scale is composed of John H. Hughes, W. F. 
Wright, C. F. Freeman, all of Dallas; Charles A. Cutler, 
of Houston, and others. 

J. F. Johnson, a mining engineer of I'arral, Mexico, and 
associates, recently purchased the old Bonanza mine, situ- 
ated just west of Sierra Blanca, Texas, the consideration 
being $14,000. The ores are zinc and lead sulphides carry- 
ing silver. There is a large dump, besides the bodies of 
underground ores that have been exposed. A good market 
for the ore, which runs about 45% zinc, has already been 
established. The railroad shipping point is only two miles 
from the mine. William Linderburgh recently purchased 
the Black Shaft and Sancho Panzo mines, situated in the 
Van Horn district, about two miles south of the Hazel 
mine, and will construct a mill. Considerable development 
work has been done upon the Black Shaft, which contains 
■ copper and silver ore. The surface workings of the Sancho 



Panzo mine have yielded several thousand dollars in copper 
and silver. 

The Xew Era mine, situated north of Van Horn, is l>eing 
developed under the direction of S. H. Worrell. (Quanti- 
ties of ore that contain 17% tungstic acid are being taken 
out. This ore is worth more than $100 per (on. James 
Arthur has opened a promising gold prospect six miles 
from Alpine. He is making preparations to begin regular 
shipments to the smelter at El Paso. There is much activ- 
ity in mining prospecting in the mountains around Alpine. 
In the Shatter district several new claims have been recently 
located. Preparations are being made for considerable de- 
velopment work in that district during the next several 
months. The Terlingua quicksilver district, in the southern 
part of Brewster county, is keeping up its record of pro- 
duction. The sale of several undeveloped cinnabar prop- 
erties in that section is reported, and it is said the pur- 
chasers will start development work some lime this fall. 



TORONTO, CANADA 

Search for Gold in the North. — Milling at Porcupine. 
— Progress at Cobalt. 

An expedition organized by A. W. Scott of Toronto, 
usually known as 'Lucky Scott,' is preparing to leave St. 
John, Newfoundland, for an 18 months' trip to Baffin 
island, to search for placer mines. Mr. Scott has had 
experience in various parts of the globe and made money in 
Cobalt and Porcupine enterprises. He was for several 
years a partner of F. Augustus Heinze. Other members 
of the part; are Alexander Gillies and Ernie Holland, well 
known in connection with Northern Ontario mining, F. 
Osgoode Pell. New York, Arthur Laugdou, and Thomas 
Mortisey, Nevada placer miners, and Frank Yasser, a 
South American miner. The expedition is financially 
backed by J. R. De Lamar, W. B. Thompson, and F. N. P. 
fell, of New York. A ship of 300 tons burden has been 
chartered and will sail from St. John, Newfoundland, 
about July 10. Its immediate destination will be Ponds 
inlet, on the northern coast of Battins island, across from 
Greenland, and provisions sufficient for two years will be 
taken. Reports of placer goldfields on Baflins island were 
brought back by the Government steamer Arctic last fall, 
Robert James, the second officer, having secured rich 
samples. ,\Ir. James accompanies the Scott expedition as 
guide and interpreter. The only inhabitants of the country 
are small bands of Eskimos, and the nearest white settle- 
ment is one thousand miles distant. 

Four mills are now in regular operation at Porcupine, 
the Dome with 10 stamps, the Hollinger with 30, the Mc- 
fntyre with 10, and the Yipond. with a crusher plant and 
ball-mill, handling only a few tons per day, owing to the 
non-arrival of a portion of the machinery. No informa- 
tion as to the actual gold production has been given out. 
The Merrill plant at (he Dome is reported to have been 
found highly effective and satisfactory, the extraction of 
gold from the ore being almost complete. The second level 
at the Crown Chartered is proving up well. Driving was 
done for 36 ft. on the quartz stringers recently found, and 
a raise cut at the end of the drift enclosed a lens of high- 
grade ore. Conditions at the 200-ft. level are reported 
equally as favorable as at 100 ft. where over 900 ft. of 
underground development shows parallel rich quarts lenses, 
with intervening schist which carries good ore in some 
places. At the McEneany the vein, which was '2 ft. wide at 
the depth of 200 ft., has widened to 6 ft. on the 300-ft. level, 
and shows persistent gold content. The company will test 
100 tons at the Mclntyre mill to decide whether the cyanid- 
ing process will be advisable. Another pocket of rich ore 
has been found al the 50-ft. level of the North Dome. 
The shaft is being put down to the 100-ft. level, where a 
cross-cut will be run north to the vein and driving under- 
taken to explore the orebody. The Porcupine Lake, which 
is putting down a shaft to 100 ft., discovered gold in the 
porphyry at the base of the shaft at a depth of 10 ft. 
At the Plenaurum driving has been done for 125 ft. on the 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



59 



vein found in No. 2 shaft, where it carries one foot of good 
■ore. A new vein has come into it, widening- the quartz to 
3 ft. The Mclntyre, on No. 2 vein at 200 ft., has opened 
a body of ore averaging 66 in. wide, which promises well. 
The main vein of the Swastika has been cut at the 400-ft. 
level, where it shows over 5 ft. of quartz carrying free 
gold. The foundation of the stamp-mill is being con- 
structed. Ten stamps will be erected at first, the number 
to be increased later if required. 

The Whiskey Lake region, on the north shore of Lake 
Huron, which a few weeks ago was the scene of a short- 
lived gold rush, has been examined by A. P. Coleman, 
who reports to the Provincial Department of Mines that of 
all the claims which have been staked only one, the Peyton, 
shows any promise. It has an outcrop of quartz carrying 
free gold, but no well defined veins. A number of 
low-grade copper deposits have been found in the district. 

Cobalt and the adjacent silver-producing districts are 
showing renewed activity, the industry receiving a decided 
stimulus from the increased price of silver, and the con- 
struction of the Elk Lake branch of the Temiskaming & 
Northern Ontario railway. A number of abandoned pros- 
pects are again being operated, particularly in the out- 
lying districts, where the cost of transportation renders 
the working of all but the richest deposits unprofitable. In 
Die Elk Lake districts, where only two prospects were be- 
ing worked a year ago, there are now twenty in active 
o] eration, and in Gowganda a similar revival has been ex- 
perienced. At the Ophir property in Cobalt active work 
has been in progress for two months, and three veins, 
carrying good milling ore, have been found in sinking a 
new shaft. The Buffalo has just broken ground for a 
refinery capable of handling the whole product of the mine. 
The process employed at t lie Nipissing plant, with some 
modifications, will be employed. The old Cobalt Central, 
which after having been in litigation for some years, and 
Avas acquired by the Pennsylvania Canadian Co., is under 
development and has a considerable amount of milling ore 
blocked out. The Beaver's financial statement for the 
quarter ended May 31 showed a cash balance of $55,829 
on hand. The mill has been running steadily since March 18, 
the total production being $43,907, and the net profits 
$36,895. At the mine the main shaft is down to 590 ft. 
and cross-cutting will shortly begin at the 600-ft. level. 
High-grade ore is being taken out on the 400-ft. level. 
An interim dividend of 3% was declared. 

The Trethewey's financial position on May 31 was as 
follows : Cash in bank and due from smelters, $147,221 ; 
•ore ready for shipment and in transit, $55,820; total, 
$203,041. The net profits for May are roughly estimated 
at $20,000. The statement of the Crown Reserve for the 
first five months of the year shows a gross production of 
1,143,142 oz. valued al $699,847, which after paying royalty, 
dividends, etc., left a net surplus of $816,741. The Wett- 
laufer of South Lorrain is maintaining net earnings of 
$24,000 per month, sufficient to meet the dividend require- 
ments of 20% per year. The new mill is complete, the 
tailing being re-ground in Huntington mills and treated 
on slime tables, which produce from IV2 to 3 tons of con- 
centrate per week. These latter are a new feature in the 
Cobalt district, none of the other mills having yet adopted 
them. The Dominion Safety Explosives Co., organ- 
ized by Toronto capitalists, will erect a factory in Coleman 
township, about three miles from Cobalt, for the manufac- 
ture of dinitrolite. 

Returns made to the Ontario Bureau of Mines for the 
first three months of 1912 show an increased value for all 
items of the mineral output as compared with last year, 
except gold, which declined because of the Porcupine 
tire 1 . The silver production was 7,439,044 oz., value $4,092,- 
405, an increase of $383,861, though the quantity produced 
was sligtly diminished. Cobalt proper produced 7,006,842 
oz., South Lorrain, 285,042 oz., and Gowganda, 147,103 oz. 
Copper was produced to the amount of 2577 tons, value, 
$306,799; nickel, 4722 tons, $1,009,702; and pig iron 116,- 
■'824 tons. $1,858,274. 



SALT LAKE CITY, UTAH 

Coal Situation in Utah. — Asphalt Deposits. — Consoli- 
dated Mercur Revives. 

Development of the coal deposits continues to occupy a 
large part of the attention in Utah mining. The lead of 
the United States S. R. & M. Co. in this direction is being 
followed by a number of smaller companies, and the out- 
look is for the free expenditure of money in coal operations 
for the next few years, as the recent decision of the Inter- 
state Commerce Commission regarding freight rates on 
Utah coal has given it a great impetus. For a number of 
years Utah coal has been practically shut out of Idaho and 
the Northwest through differential freight rates in favor 
of Wyoming coals. The Harriman railroads have been in- 
terested in the Wyoming fields and have sought to main- 
tain a monopoly for Wyoming coal in the Northwest. In 
the case of the Castle Valley Coal Co. and Consolidated 
Fuel Co. versus the Atchison, Topeka & Santa Fe and 25 




MAP OF UTAH. 



other railroads, the Commission has handed down a deci- 
sion fixing the differential at not over 25c. per ton on Utah 
coal to points in Idaho, Montana, Oregon, and Washington. 
Previously, the differential has been as high as 75c. per ton. 

The Pittsburg-Salt Lake Oil Co. has begun a campaign 
to open a market for Utah rock asphalt. The company 
owns a deposit of 480 acres near Sunnyside, Carbon county, 
and recently conducted an excursion of Salt Lake and Ogden 
city officials and others to the property. Utah asphalt has 
been used spasmodically in Salt Lake, and the paving has 
given excellent satisfaction, but the organizations control- 
ing the better established product have been able to keep 
control of the city contracts through underbidding. The 
owners of the Utah asphalt have never been properly 
equipped for getting out the product economically in quan- 
lifies. It is announced that the Pittsburg-Salt Lake com- 
pany proposes to equip its quarries thoroughly for econom- 
ical extraction on a large scale, and will make a systematic 
effort to go after the Western market. 

The Consolidated Mercur, operating one of the pioneer 
cyanide plants, is certainly dying a lingering death, if death 
it is to be. Over a year ago the directors officially informed 
the stockholders that the property was on its last legs, and 
would have to close down within the year unless new ore- 
bodies were discovered. But the plant was kept in oper- 
ation through the year, at a slight profit. Again, before 



till 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



the time tor the last annual meeting, the directors notified 
the stockholders that they would he asked to vote authority 
to the board to sell the equipment and close down perma- 
nently. The stockholders gave this authority, and now it 
is announced that new ore has been developed which will 
keep the old mine and mill going at least another six months. 
The holders of the shares are now hoping that the property 
will continue this show of vitality and develop more ore- 
bodies to prolong this lease of life. 

Local shareholders of the Ohio Copper Co. are agitating 
the formation of a stockholders' protective committee, but 
as yet nobody has taken the lead to crystallize this feel- 
ing. This applies also to bondholders, of whom there are 
a number in Salt Lake City. Local people have always had a 
great deal of faith that the Ohio, with proper management 
and financing, would attain a position profitable to all 
concerned. The majority still hold to this belief, although 
they have not taken kindly to the reorganization plan, call- 
ing in effect for an assessment of $1, with liquidation of 
all stock which does not come into the reorganization on a 
basis of 25c. per share. Those most familiar with the 
property would like to see the Heinze interests eliminated, 
control of the Mascotte adit by the Ohio company, enlarge- 
ment of the mill, and the expenditure of more money for 
development of ore. While the new financing plan is sup- 
posed to provide for all of these things except the owner- 
ship of the Mascotte adit, the local stockholders think owner- 
ship of the means of outlet for ores should be included in 
order to insure permanent success. Apparently this is 
one point on which Heinze intends to stick out indefinitely, 
for the Mascotte adit has been a source of great profit to 
him. Despite all this talk, however, the proposed reorgan- 
ization plan has been acted on favorably by the stockholders 
at the adjourned annual meeting at Portland, Maine, and 
indications are that it will go through unless legal action 
is taken to prevent it. 

GLOBE, ARIZONA 

Inspiration Visited by Officials. — Miami Production 
and Prospecting. — Old Dominion and South Live 
Oak. 

Charles E. Mills, formerly manager of the mines at 
Morenei, and who was recently appointed general man- 
ager for the Inspiration Con. Copper Co., has arrived in 
Globe to assume charge of operations at the mine. He 
was accompanied by W. H. Aldridge, representing the 
controlling interests in the company; L. D. Rieketts, con- 
sulting engineer, and W. I). Thornton, the vice-president. 
Over 500 men are employed in development and construc- 
tion work. Sinking of three development shafts continues, 
also the main west working shaft, which is now over 60 
ft. deep. It is intended to sink this shaft 1000 ft. for 
the extraction of ore from the Live Oak orebody. The 
new Ingersoll-Rand compressor of 1200-cu. ft. capacity is 
now in operation at the portal of the Inspiration adit. 

Preliminary figures give approximately 2,700,000 lb. as 
the production of the Miami Copper Co. for June, or 
about the same as for May. There were mined 89.000 
tons of ore during the month. One churn-drill is at work 
proving the northeastern part of the property, and a Sul- 
livan diamond-drill is in operation on the 570-ft. level 
exploring the ground below that level. It is reported that 
ore has been developed nearly 500 ft. below the level, 
but B. B. Gottsberger, the manager, will neither confirm 
nor deny the report and states that the future policy will 
be to make public no more information on results of 
diamond-drilling. 

The Old Dominion smelter produced 2.112,000 lb. of cop- 
per in June, with an average of 2^2 furnaces in operation. 
It is expected that three furnaces will be working in July 
as the amount of custom ore received is gradually increas- 
ing, due to the stimulus of the present high price of cop- 
per, and it is probable that the mine production will also 
be slightly increased. About 1200 men are employed. 

Churn-drill hole No. 1 of the South Live Oak Develop- 



ment Co. lias been discontinued at a depth of 825 ft. with- 
out discovering ore. The drill is being moved to another 
location, where it is proposed to start a new hole on a 
faulted zone in the granite formation. John Rose reports 
the discovery of copper ore in a 100-ft. adit in diabase 
on the tfose group of nine claims north of and adjoining 
the Inspiration. He states that a vein of copper-silicate 
ore, ft. wide and averaging 15% copper, has just 

been disclosed. The larger mines of the Miami district 
are gradually supplanting horses with motor trucks for 
hauling supplies from Miami to the mines. Inspiration 
has three trucks, a 3 '/2-ton Alco. a 2-ton Velie, and a 
1500-lb. Velie. A .'5-ton Velie is hauling supplies to the 
Live Oak mine, ami the Miami Copper Co. is using a 
1500-lb. Velie. 

BOSTON 

UNITED Verde Extension Reorganization.— Butte & 
Superior Litigation. 

The United Verde Extension M. Co. illustrates the futility 
of announcing a reorganization, and seeking to bolster it 
witli the name of some prominent man. The directors of 
the company announced a plan of reorganization recently 
which calls for an increase in the capital stock from 400,000 
shares, par $10, to 1,500,000 shares, par 50c. The company 
owes $20,000. It is proposed that new stock be issued in 
exchange for that now outstanding, on a basis of share for 
share; that 40,(100 shares of treasury stock be issued to 
liquidate the debt of $20,000, and thai 50,000 shares be 
sold to James S. Douglas, an Arizona banker, the son of 
James Douglas, president of Phelps, Dodge & Co., for 
50c. per share, realizing $25,000 in cash for deep develop- 
ment work. Mr. Douglas and his associaties, in addition, 
were to be given an option until June 15, 1915, to purchase 
all or any part of 400,000 shares at par, 50c. per share. 
Because of his services in financing the company's affairs. 
Mr. Douglas, according to this plan, was to receive 150.000 
additional shares of stock. When the announcement was 
made it was apparently so disingenuously worded as to give 
the idea that the senior James Douglas was to step in as 
sponsor for this checkered prospect of the Jerome district. 
It was not until confirmation was sought that it was made 
plain that he was in no wise concerned in the deal. The 
fact that his son alone figured in the matter, that the plan 
of reorganization was not considered equitable, and that 
due pains were not taken at the outset to disabuse the 
public of the natural impression that the Phelps-Dodge 
interests were identified with it. caused the stock to decline, 
instead of appreciate. A protest is being voiced against 
the reorganization plan, and there is talk of a protective 
company of Boston stockholders being formed to present a 
more acceptable plan of reorganization. 

Shares of the United Verde Extension have suffered a 
good deal in price because of the suggestion that W. A. 
Clark would institute litigation against the company. A 
similar case is that of Butte & Superior, which recently 
Suffered an 8 or 9 point decline because of a like menace. 
Butte & Superior's estate was formerly among the Clark 
holdings and adjoins the Elm Orlu. Boston market inter- 
ests were alarmed at the news sent from Butte to the effect 
that Mr. Clark proposed to start an apex lawsuit against 
Butte & Superior. The remote possibility of such litigation 
sent the stock off from the high price of 51% it attained a 
few weeks ago and at the same time sent cold chills up a 
number of Boston spines. Hayden, Stone & Co. are not 
believed to be painicularly well liked by Mr. Clark, who 
has more than once given voice to the opinion that the 
porphyry copper producers have not acted in good faith 
under the curtailment agreement of two years ago. Hayden, 
Stone & Co. have resented Mr. Clark's altitude, but when it 
became definitely known that Mr. Clark intended to fight 
Butte & Superior, that banking house suggested that the 
matter be turned over to a disinterested body of engineers 
to settle by arbitration. It appears probable that this will 
be done. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



61 



General Mining News 

ALASKA 

Cordova 

The Hubbard-Elliott Copper Co. has arranged for pack- 
ing in 20,000 lb. of provisions this summer. Sixteen men 
are at work on the 'Albert Johnston' adit, which must be 
driven 900 ft. to intersect the lode. It is hoped to com- 
plete the work in May 1913. It is said that this will 
make available 094,000 tons of ore averaging 20% copper, 
but the name of the engineer making the estimate is not 
given. The Regam M. Co. is working 15 men on a cop- 
per property near Kennicott; E. F. Gray is directing the 
work. Stephen Birch is quoted as estimating shipments 
from Kennicott this year at 40,000,000 lb. copper, as against 
23,000,000 lb. in 1911. 

Juneau 

The report of the Alaska United G. M. Co. for May 
shows that 18,634 tons of ore was crushed from the Ready 
Bullion and 20,790 from the 700 Ft. Claim, realizing $50,232 
and $48,820, respectively. The yield per ton of ore in 
the former was $2.72, and the operating profit $22,222; 
in the latter, $2.37 per ton, yielding profits of $22,467. 
On the Ready Bullion 296 ft. of development work was 
done ; on the 700 Ft. 538 ft. At the Alaska Mexican 20,517 
tons was crushed, yielding $2.98 per ton, at an operating 
profit of $30,965. During the month 147 ft. of develop- 
ment work was done. 

Small acetylene lamps, worn on the cap like a coal-miners' 
lamp, are being substituted for candles in the Treadwell 
mines. 

Katalla 

The Amalgamated Development Co. has increased the 
capacity of its refinery to S00 gal. per day. Ore has been 
found at 580 ft. in an additional well, but drilling is being 
continued. A rotary drill has been ordered. The Alaska 
Oil Fields Co. and the Royal company have each ordered 
rigs for drilling. 

Nome 

Six new dredges are expected this year, two for the 
Port Clarence district, two for Casadepaga creek, and two 
for the Kotzebue country. The New Era Mining Co. has 
been organized locally to buy the two stamp-mills here 
and move them to Snow gulch. 

Valdez 

A steam-hoist has been ordered for the Alice property 
on Shoup bay. The surface tram, 900 ft. long, at the 
Fidalgo mine, has been completed, but the aerial tram will 
not be ready for operation for about three months. 

ARIZONA 

Much protest is being made among mining men against 
the new tax schedule. Following the creation of a tax 
commission and the adoption of tax laws by the last legis- 
lature, the assessed valuation of mining property has been 
raised about 300%. In Yavapai county the assessment was 
raised from $1,600,000 to $5,200,000, and in Cochise county 
from $4,000,000 to $12,000,000. Probably a hearing be- 
fore the commission will be requested. 

Cochise County 

The Mascot Copper Co. is prospecting its property near 
Dos Cabezos with diamond-drills under the direction of 
F. L. Sizer. It is now announced that in one hole at a 
depth of 600 ft. a body of sulphide ore of good commer- 
cial grade, 44 ft. thick, of which 33 is high grade, has been 
penetrated in territory not previously prospected. Mr. 
Sizer believes that the same lens of ore has been found at 
two other places. 

The Huachuca mine, consisting of 160 acres of patented 
mineral land near Hereford, has been sold to J. J. Brown 
and F. W. Graham, of Denver, by Mrs. J. H. Hockley, 
and the first payment of $5000 has been made. Under the 
terms of the bond the new owners agree to spend $20,000 



on the property during the year. The erection of a mill 
is planned. The Minneapolis Copper Co. has resumed 
operation and will ship 50 tons of high-grade ore weekly 
to the Douglas smelter. The C. & A. mine, near Court- 
land, has resumed work. Ore shipments from Courtland 
for the six months ended June 30 amounted to 460 cars 
of 45 tons each, while the total shipments in 1911 were 
only 462 cms. 

Maricopa County 
The Rogers Spring M. & S. Co. smelter at Rogers Spring, 
35 miles northeast of Phoenix, is expected to blow in 
on September 1. The capacity of the plant is 60 tons 
per day, and a large supply of custom ore is available. 
Coke will have to be hauled from Phoenix. It is reported 
that the Harqua Hala mine will be reopened early in 
July. Robert Browne has purchased the buildings of the 
Goddard mine. An orebody 6 ft. wide has been found in 
the Mildred mine, near Stanton; some of the assays run 
as high as $100 per ton. D. B. Genung is superintendent. 




s o to zo 3omlles 



WESTERN ARIZONA. 

The Nelson group, in the San Domingo district, has been 
sold, and a mill will be built by the new owners. The 
new mill at the Monarch is expected to be in operation 
shortly. Large bodies of sulphide ore have been found 
in the Vulture mine. 

Mohave County 
Thomas McNeely has bonded his property in Mineral 
Park basin to H. E. Bierce, who is driving a deep adit 
to cross-cut the vein. The Frisco mines have produced a 
bar worth $7000 from a two-weeks clean-up. E. H. Barton 
is manager. 

Machinery for the 200-ton mill of the Arizona South- 
western M. Co. has been delivered at the property and it is 
reported that the mill will be in operation within three 
months. L. Hoffman is general manager. At the Mitchell 
35 men are at work sinking the shaft to the 500-ft. level. 
The shaft is in ore which is reported to average $100 per 
ton. Joe Onelto is in charge. 

Pinal County 
The Calumet Copper Creek M. Co., 35 miles from Hay- 
den, has erected a 150-ton mill, 2V 2 miles from the mine, 
and is hauling the ore with auto trucks. About 75 men 
are employed and high-grade ore is being shipped to the 



62 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



El Paso smelter. R. Sibley is president and general man- 
ager. 

The Geeseman-Leatherwood property has been closed 
down by the Copper Queen Co. and will be allowed to 
lie idle until a branch railroad can be extended to it. 
There are la rue high-grade orebodies in the mine, but they 
cannot be worked at a profit with the present 70-mile 
wagon haul required. 

Yuha Count? 
The Swansea Con. M. Co. has arranged to exchange 
ores with the Blue Bell, as this will give a better Smelt- 
ing charge at both the Humboldt and Swansea smelters, 
and four carloads per week are thus being exchanged. Re- 
ports from Swansea aie that the smelter will soon be 
blown in. C. Clerc is manager. The Steece mine has 
closed down for the summer. The Corem M. & R. Co. 
has taken over the Henry Roberts and Burke Bros, prop- 
erty in the Riverside mountains. A. L. Engedow is super- 
intendent. 

CALIFORNIA 

Inyo County 

The Poverly mine, which was bought by A. Baring 
Gould from the Melton estate, has resumed work. Exten- 
sive improvements are being made, two shifts are at work, 
and the mill is in steady operation. The main shaft at 
the Custer has reached a depth of 230 ft. John Thorndike 
is manager. The Christmas Gift is shipping ore averaging 
$80 per ton; 500 tons is ready in the stopes. L. D. Skinner 
is manager. Work will be resumed at the Lucky Jim, under 
the management of Chas. Collins. C. M. Long has bonded 
his claim, adjoining the Custer, to Mr. Minear for $8000. 
The Cerro Gordo is making regular shipments of zinc ore 
to the smelters in Oklahoma. C. J. Borglin has set up a 
dry washer in the Stringer district. A 15-hp. engine has 
been installed on the claim of the Cold Placer Mining Com- 
pany. 

Modoc County 

The reported placer strikes on Dry creek, west of (loose 
lake, have proved to be unfounded. Twenty tons of ore 
has been shipped from the Sunshine mine to the Selby 
smeller. Development work is in progress and the erction 
of machinery is planned. F. L. Schrott and R. L. Mack, 
who have a lease on the Yellow Jacket claim, are reported 
to have discovered a 20-in. vein of rich ore. The Eureka 
Milling & Amalgamating Co. has been incorporated for 
$50,000 by F. L. Evans. F. O. McFall, and M. B. Rice to 
construct a custom milling plant on the Del Floy claim. 

Nevada County 
The water supply in the upper Lake region is now so 
short that all mining operations will soon be compelled to 
suspend. Rich ore has been found on the 400-ft. level of 
the Mountaineer mine, owned by P. and J. Bender and F. J. 
Sloat. At the Red Top rich telluride ore has been found, 
a lot of 30 tons averaging $32 per ton. F. A. Smith, the 
manager, is negotiating the purchase of a 5-stamp mill. 
A. ('. Travis has discovered a Tertiary river channel \ -> mile 
east of Graniteville and has organized the Granitevillle G. 
M. Co. to develop it. Attachments totaling $25,000 have 
been placed upon the Balsam Flat mines, owned by the 
Alleghany M. Co., by W« Hatch and (i. A. Roberts. Per- 
mission has been granted to the Pacific Gas Light & 
Electric Co. to erect two power plants on the Bear river. 

Shasta County 
The Victor Power A Mining Co. has secured a court 
order permitting it to make an underground survey of the 
Midas, at Harrison gulch, which it claims is trespassing on 
the Victor ground at the 1200-ft. level. The Farmers' Pro- 
tective Association is still anxious to take steps to force 
the Mammoth smelter to cease operations, but has so far 
been unable to raise funds lor litigation. 

Sierra County 
(Special Correspondence.) — The gravel channel at the 
Monte Cristo has been recovered. At point of intersection 



fair gold content is reported. The Croesus Mining Co. is 
laving a line of 3-ft. wooden pipe to convey water to mine 
and mill. The 20-stamp mill has been overhauled. C. \V. 
McMeekin is manager. New machinery has been in- 
stalled at the Sixteen-to-One and development has com- 
menced. Mark N. Ailing and \V. J. Belcher have given 
a short-term bond and option on their Golden Bear claims 
to P. H. Darrah, of Pomona. The claims are between the 
Orient and Snowden Hill mines and fair-grade gravel has 
been found. Charles \Y. Morse has taken over the Oxford 
mine, near Downieville. It is reported that the Brown 
Bear, near Downieville, will be equipped with a steam- 
power plant this summer; J. G. Jackson is operating the 
mine under bond. The Oasis M. & M. Co. has arranged 
to operate the Kenton mine and mill with electric power. 
The Rio Antigua Mining Co., owning the South Fork 
quartz and gravel claims at Forest, is being reorganized as 
the South Fork Mines Co. The company recently acquired 
the properties, after operating for several years under 
bond and lease. It is planned to develop the quartz veins 
disclosed while driving for the gravel channel. F. W. 
Kuhfeld is superintendent. Arrangements have been made 
for the extensive development of the Uncle Sam mine, near 
Forest. A 30-ft. body of quartz has been found 2000 ft. 
from the adit portal, with shoots of ore showing. The vein 
is considered a north extension of Alleghany orebodies. 
G? P. Stone is manager. 
Downieville, July 8. 

Solano County 
The suit against the Selby smelter, by the Supervisors of 
Solano county, is expected to come up for its next hearing 
by the middle of August. T. C. Gregory has been engaged 
as assistant counsel for the plaintiffs. 

Yuua County 

J. J. Cusick, president of the Yuba Gold Mines Co., has 
been sued by Mrs. Jennie F. Robinson of Chicago for 
$30,000 for the return of money obtained by fraudulent rep- 
resentations. Much interest is being created by the pur- 
chases of land made by Newton Cleaveland, but it has not 
been made public in whose interest Mr. Cleaveland is 
acting. 

COLORADO 

Clear Creek County 
An electric pump is being installed at the Smuggler 
mine, where B. C. Catren is manager. At the Big Indian 
mine on Leavenworth mountain driving is in progress, and 
the indications are encouraging. Hummer & Herber are 
breaking a large tonnage of smelting ore in the Capital 
mine, and Moscript & Brandsteller are breaking a fair 
tonnage of ore. 

Gilpin County 
The Golden Rod, which owns 12 patented claims and 
two millsites at the head of Silver creek, will use machine 
drills in extending its adit, which is in 800 ft. Some 
promising veins have already been cut, and the adit will 
be extended 250 to 300 ft. A. Waters and John Hutch- 
ens, operating the East Missouri mine on Quartz hill, are 
taking out good ore from the 150-ft. level. A shipment 
of three tons of smelting ore recently gave returns of 
3.24 oz. gold and 5 oz. silver per ton. A recent trial 
shipment from the Bates mine gave returns of 2V& oz. 
gold and 20 oz. silver per ton. At the Oliver mill in 
( base gulch, 25 stamps are dropping. Nels Olsen and 
John Svvanson will install a gasoline hoist on the Cicero, in 
Chase gulch. 

San Juan County 
The road to Animas Forks has been opened and trains 
are now running to the Gold Prince mill. A new" mill 
will be constructed at the Bagley adit and the framed tim- 
ber is being shipped to the site. The 5-stamp mill of the 
Intersection is being increased to 10. A 3-ft. vein of rich 
ore has been uncovered in the Esmeralda, in Minnie gulch, 
a sample across the face giving assays as high as $1500 
per ton. During June the Highland Man- shipped 300 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



63 



tons of ore, averaging over $80 per ton, to the smelter 
at Durango. The Shenandoah, in Cunningham gulch, will 
resume work soon. The Brooklyn mine, on Red mountain, 
has shipped two ears of ore. 

Teller County (Cripple Creek) 

The ore treated by the mills of the Cripple Creek dis- 
trict is estimated as follows by the Cripple Creek Times : 

Tons. Av. Val. Total. 

Golden Cycle 32,000 $20.00 $ 640,000.00 

Portland 10,000 22.00 220,000.00 

Smelters 3,850 65.00 250,250.00 

New Portland 13,960 3.51 84,999.60 

Stratton's Independence. . .10,808 2.86 30,910.88 

Kavanaugh 1,400 2.00 2,800.00 

Wild Horse 800 4.20 3,360.00 

Total 72,818 $1,186,320.48 

The May production was 76,800 tons of a value of 
$1,263,344. The Elkton Consolidated made a record pro- 
duction during the month with an output of 3000 tons 
of $20 ore. The El Paso produced 67 cars of $30 ore 
on company account, and 40 cars of $20 ore was shipped 
by lessees. The boiler for the new plant at the Nicholls 
shaft has been installed. Electric hoists have been installed 
on the April Fool claim on Squaw mountain and on the 
Lexington Gold Hill. The Merrimac Con. Mines Co. has 
been reorganized. The Little Frank S. M. Co. has been 
sold under writ of execution to Walter A. Borland for 
$9767. The properties of the Cable Con. G. M. Co. have 
been sold by the sheriff to Olive Granfield for $3795. Suit 
has been brought by the Roxana G. M. Co. against the 
Boctor-Jack Pot Mines Co. for the alleged unlawful ex- 
tinction of ore valued at $1,000,000, on the ground that 
the apex of the vein from which the ore was mined lies 
in the Mountain Monarch, adjoining the Lucky Corner on 
Raven hill. In the suit between the Boctor-Jack Pot and 
the Work M. & M. Co. the court decided that this vein 
apexed on the Lucky Corner, so the litigation seems likely 
to be long and costly. 

IDAHO 

Blaine County 

It is proposed to consolidate the Bullion, Mayflower, and 
other mines at Bullion, witli the Point Lookout group, the 
Quincy Junior interests, and others, for the purpose of 
driving an adit to drain and develop all the claims west 
of the main road in Bullion gulch. Frank Henderson and 
C. C. Todhunter have been examining the properties. 

Idaho County 
Sale of the Coeur d'Alene group of claims, in the Ten- 
Mile district, is reported. Peter Proulx is the vendor. A 
prospect shaft is being sunk on the Mineral Zone group, 
recently sold to J. R. Painter. Arthur Hillier is in charge 
of the mine. 

Shoshone County 

The 150-ton mill at the Black Horse has begun operation. 
The Amazon-Dude M. Co. has a new water-driven air- 
compressor and an electric lighting plant. Wesley Everett 
is in charge of the property. • The Iron Mountain Tun- 
nel Co. has raised $65,000 for development purposes, 
and it is planned to resume mining and milling operations 
by September 1. The Gold Hill M. Co. has nearly com- 
pleted its 10-stamp mill and crushing is expected to start 
August 10. The ore is said to average $17.20 per ton. 
It is reported that the Stewart M. Co. has over $150,000 
in the treasury, a loan of $84,000 to the Ohio Copper Co. 
having been recently repaid. 

The Bunker Hill & Sullivan has brought suit against 
the Caledonia, in order to fix boundary lines and quiet the 
title to a portion of the ground. The Bunker Hill claims 
the orebodies below the 500-ft. level and has enjoined the 
Caledonia from working them. At the meeting of the 
Bear Top-Orofino M. Co., held July 1, a new company, 
the Twin Star Mining Co., Avas incorporated to take over 



the Bear Top. The new company will assume all indebted- 
ness and will issue shares to the stockholders in the other 
companies upon a 90% basis. It is expected to resume 
operation by the middle of July, and the lower adit, now 
in 100 ft., will be continued to a length of 2600 ft. The 
third payment has been made upon the Tuscumbia and a 
contract has been let to drive a 300-ft. adit. 

Washington County 
The Landor Copper Co. is shipping ore that averages 
30% copper, in carload lots, according to the Wallace Miner. 
Several of the Eastern stockholders have recently visited 
the mine and the report has been given out that the equip- 
ment will be increased and the scale of working enlarged. 

MONTANA 

Silverbow County 
(Special Correspondence.) — A private telegram received 
in Butte states that after a conference with W. A. Clark, 




smelter, great falls. 

who was hurriedly called to New York, a setlement has been 
brought about wherein it has been agreed that Mr. Clark 
will drop his contemplated suit against the Butte & Superior 
Co. for the alleged extraction of ore from the Elm Orlu 
mine. It cannot be learned just how much ore it is alleged 
the Butte & Superior people have taken from the Clark 
mine, which adjoins the Black Rock, but according to 
reports it is said that the Clark engineers claim that there 
has been a very large amount. 
Butte. July 6. 

The copper output in Butte for June was 24,607,582 
lb., or 4,474,780 lb. less than in May. The decline 
was due to the fact that there were only 29 working days 
and because the Butte Coalition mines were out of commis- 
sion on account of changing the hoist from steam to com- 
pressed air for power. The Tuolumne output was less on 
account of mining- lower-grade ore. The output in June, 
1911, was 20,412,120 pounds. 

The mining companies and the miners' unions have 
signed a 3-year contract providing that the minimum wage 
shall he $3.50 underground and $3 for surface work. When 
copper sells between 15 and 17c. per pound these shall be 
increased to $3.75 and $3.25. When copper is over 17c. 
underground men will receive $4 and when over 18c. surface 
workmen will receive $3.50. The Lincoln Trust Co., of 



64 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



New York, has begun .suit to foreclose a mortgage of $2,- 
000,000 on the La France Copper Co. The Lexington Mines 
Co. has been formed to bid in the La France, and it is 
reported that the United Copper Co. of which the La France 
is a subsidiary, will be reorganized. About one-third of the 
$45,000,00(1 shares of this company are held abroad, 
largely in Holland, and a representative of these interests 
is now in this country to bring: about the reorganization. 
The Butte & Superior mill is working at full capacity, 
making a 92% recovery. A large orebody has been found 
on the 1200-ft. level. 

NEVADA 

Churchill Couxty 
Two cars of concent rate from the Nevada Hills has been 
shipped to the International smelter at Tooele, with which 
a contract has been signed. Shipments are said to average 
600 oz. silver per ton. The mill of the Nevada Hills is 
now working at a high efficiency. Reports have been re- 
ceived of the discovery of copper deposits about 100 miles 
south of Winnemucea, and IS miles from Boyer's ranch, 
in Dixie valley. Some of the ore is reported to contain 
30% copper and the amount of 3% ore is reported very 
large. 

Esmeralda Couxty 

The production of the Goldfield Consolidated Mines Co. 
in June, according to the preliminary estimates pre- 
pared by J. F. Thorn was 32.300 tons, the largest tonnage 
for any single month in the history of the company. This 
includes ore that has been extracted from the deepest 
workings of the Clermont and Grizzly Bear mines, at depths 
of 1000 and 1300 ft., and that has been shipped to the 
reduction plant of the International Smelting tjc Refining 
Co. at Tooele, Utah. Gross recovery of gold from the June 
production is placed at $542,000, operating expenses at 
$200,000 and net realization is estimated at $342,000. This 
shows a gross value of the product to be slightly less than in 
May. but the net profit is larger than in the previous month. 
The tonnage produced during the month is more than 2000 
tons in excess of the largest output made in any month in 
the past. It is probable that the final report for the month 
will show that the high-grade ore shipped to the smelter has 
increased the profit during June. 

Lyon County 

Large orebodies are being developed below the fourth 
level of the Mason Valley mine, the average being ly'2% 
copper. Development work at the New Yerington Copper 
Co. "property is planned and the drifts on the 250, 300. and 
400-ft. levels will be extended. Good ore is being found 
on the seventh level of the Nevada Douglas; the vein is 
20 ft. wide. The inclined shaft is being deepened 200 ft. 
It is reported that the Mason Valley will take over the 
Bluestonc mine. The Bluestone, which is owned by J. R. 
De Lamar, has been developed to a depth of 350 ft.; drilling 
to a depth of 700 ft. has shown that the ore is low grade. 
It is reported that 1,500,000 tons of 2% ore is developed. 
Nye Couxty 

A fire at Tonopah on July S did $150,000 damage to the 
town, but none of the mines are affected. Rich ore is 
reported at the Toro Blanco, at Manhattan; F. H. Mitchell 
is manager. Much interest has been excited at Tonopah by 
the discovery in the Merger Mines property. The shaft has 
reached a depth of 070 ft. and has passed through 30 ft. cf 
vein material, of which 12 ft. averaged $25 per ton. The 
Mizpah Extension is raising from the 500-ft. level in $40 
ore. The Jim Butler will utilize the old Belmont mill. 
Eight mines are now producing in the district and 24 hoists 
are in operation. The new Belmont mill started work on 
July 7. The summary of operation of this company for 
the quarter ended May 31 is as follows: 

Receipts from sales of ore, bullion, etc.. $855,849 ; mining, 
milling, and administration expenses, $450,826; net earnings 
for quarter, $450,023 ; miscellaneous income, $9118 ; total 
net income for the quarter. $414,141. Available resources. 
May 31. 1912: Due from smelters, $167,830; due from 



others. $5020; loans on collateral, $150,000; cash in banks, 
$789,006; total, $1,111,857. 

The annual report of the West End Consolidated shows 
that during the year ended March 31, 15.903 tons, averaging 
$16.75 per ton was milled at a cost of $6.30 per ton. giving 
a total net return of $158,387. Smelting ore, of an average 
value of $33.07 was shipped to the amount of 1151 tons, 
with a net return ol $20,254. Of tailing, 15,905 tons was 
milled, with a net return of $2.30 per ton from tailing av- 
eraging $8.70. The total net earnings for the year were 
$91,995. 

The mines of the Tonopah district shipped a total of 
8777 tons of oie. of an estimated value of $219,425. to the 
mills last week. The Tonopah Mining Co. sent 3500 tons, 
the Belmont 1950 tons. Montana 1030 tons, Tonopah Exten- 
sion 107S tons. West End 750 tons, and MacNamara 469 
tons. .,,1 

White Pixe Couxty 

Eight men were killed in the Copper Flat pit of the 
Nevada Consolidated on July 7, by the premature explosion 
of the powder in a churn-drill hole, one of them being the 
powder 1 man. The cause of the explosion is not known. 
There ai - e 750 men employed in the open cuts, 306 at the 
Veteran, and 250 at the Giroux mines. The Giroux is 
shipping ore from the Taylor dump, where 600 tons of high- 
grade ore is piled up. It is expected that work will shortly 
be resumed on the 1200-ft. level of the Alpha workings. 
Shipments during the past month have averaged over 1000 
tons per day. The contact deposits in the Veteran are hold- 
ing out surprisingly well and are creating greater faith in 
their possibilities as to persistence and extent. The Copper- 
mines company is shipping ore of a copper content of 13 
to 15%. The Berry Creek M. Co. has been incorporated, 
with head otlices at McGill. 

The Railroad Valley Saline Co. has been reorganized into 
the Railroad Valley Co., of 1.000.000 shares, of which 
400,(100 will be used to take over the Saline company and 
200,000 will be sold. 

NEW MEXICO 

Graxt Couxty 

The Mineral Mountain M. Co. will begin work within 
the next two months and continue the adit already started 
until it cuts the vein. The National G. & S. M. Co. has 
opened a 4-ft. vein of good ore. At the El Oro rich ore 
is being extracted. George Ingham is in charge and will 
let a contract to deepen the shaft to 100 feet. 

Sierra Couxty 
Copper claims near the Victoria Chief have been bonded 
to El Paso people by Emory Hickock. but the price has 
not been disclosed. Some of the best claims of the Cabal- 
lero district have been optioned by Wilbur Grant and 
J. C. Tandy, of El Paso. Ore from the St. Lawrence is 
being hauled to Cutter and accumulated on the dumps. 

OREGON 

Baker Couxty 
At the annual shareholders meeting of the Humboldt Con. 
Gold Mines Co., F. R. Mellis was elected president for 1912, 
and J. A. Howard, secretary. The Laclede Con. Gold & 
Copper M. Co. is developing a quartz property near North 
Powder; an adit is being driven and has cut a vein 8 ft. 
wide. J. A. Gyllenberg is superintendent. Emil Melzer 
will take charge of the new construction planned for the 
Blue Mountain M. Co., operating the Last Chance and 
Baby McKee properties in Cable Cove. 

Jackson Couxty 

Mike Womack reports the finding of a large orebody on 
Frog creek. 7 miles from Ashland. Assay returns of from 
$4 to $18 per ton are reported, and it is stated that out- 
crops of the vein can be traced for several miles. Capital 
has already been proved for the sinking of a shaft. 
Josephixe Couxty 

The Darkes mine, near the Takilma, has been purchased 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



65 



by E. E. Phillips. It is expected to begin shipment soon 
and the ore will be hauled by teams to Grants Pass. Ore 
assaying $35 per ton is being .taken from the Red Bean 
mine, on Slaveout creek, owned by Riggs, Flamm & Evans. 
K. S. Tucker has been appointed receiver for the Alameda 
Consolidated Mines Co., which owns 800 acres of land and 
has sold $13,000,000 worth of stock. 

UTAH 

Juab County 

The Eureka Hill Mining Co. has filed suit against the 
Bullion Beck for $18,750 for trespass. Directors of the 
Tintic Standard have levied an assessment of Y^e. per 
share. Work on the 1000-ft. level of the Opohongo is 
in progress. The zinc ore being shipped from the May 
Day averages $30 per ton, and it is expected that a con- 
siderable profit can be made from this class of ore. The 
Eagle & Blue Bell is making large shipments from the 
700-ft. level. The earnings for May were $10,000, and 
those of June nearly as much. The Chief Consolidated 
now has a surplus of over $130,000. The Iron BlosSom 
has $300,000 in its treasury and will pay a dividend this 
month. 

Summit County 

Ore shipments from Park City during the month of 
June amounted to 196 cars aggregating 7182 tons, 204.3 
being shipped over the Rio Grande and 5139 over the 
Union Pacific. The shippers were: Daly West, 2574 tons; 
Silver King Coalition. l!)7(i; Daly-Judge, 1707; Grasselli 
company, 290; New York Bonanza, 174; Ontario lessees, 
119; Charley Moore, 70 ; Little Bell company, 143; E. J. 
Beggs, 72, and Park City Sampler, 42 tons. 

The Utah Ore Sampling Co., of which A. W. Gates 
is manager, has bought the Mcintosh ore sampler at Park 
City. The Utah company, of which Jesse Knight is pres- 
ident, was formed some time ago to take over the Taylor 
& Brunton sampler at Murray, the Pioneer sampler at 
Sandy, and the Silver City mill at Tintic. It is reported 
that the Silver King Coalition may be sold to the con- 
solidated company to terminate the litigation between 
them. Work has been resumed at the Ontai'io mill. 

WASHINGTON 

Ferry County 
During April shipments of ore from the mines of the 
Republic district amounted to 3077 tons, as follows : Re- 
public Mines Corporation, 2433 tons; San Poil Con. com- 
pany, 360; Knob Hill, 24S, and Rathfon Reduction Works, 
35 tons. 

CANADA 

British Columbia 

The British Columbia Copper Co. produced 996,000 lb. 
of copper during June. It is reported that a 7-ft. vein 
of chalcopyrite averaging 18% copper has been cut in the 
shaft of the Rocher de Boule company. The Silver Stand- 
ard reports that in sinking its shaft 135 ft. silver-lead 
ore worth $25,000 was extracted. 

It is stated on good authority that the Red Cliff Min- 
ing Co., Ltd., will take up the option on a controlling in- 
terest in the stock of the Tyec Copper Co., Ltd., which 
expires July 31. The mining company is ready to guaran- 
tee delivery of ore at the rate of 100 tons per day at 
$1.15 per ton on shipboard. Several of the British share- 
holders have recently visited the mine. The Salmon-Bear 
River Mining Co., which has its headquarters in Vancou- 
ver, is incorporated for $1,000,000 in 25c. shares. Of these, 
260,000 have been sold for development purposes, and 
2.440,000 will be used in a proposed pooling agreement. 
The company owns eight claims on Salmon river upon 
which development is in progress. Silver-lead ore has been 
found in a number of places, and is now being developed. 
Ontario 

The Vipond mill is treating 75 to 85 tons of ore per 
day and stoping between the 100 and 200-ft. levels is in 
progress. The stamp-mill of the Mclntyre is at work; 



good ore is being found on .the 300-ft. level, where the 
drift is in 300 ft. <Jh the vein. A new company has been 
organized to operate the mill on the Nova Scotia. D. M. 
ISteindler is president. During May the Buffalo mill pro- 
duced 109,295 oz. of silver from 4553 tons of ore of an 
average silver content of 2S.22 oz. A new vein has been 
found on the 150-ft. level of the Hudson's Bay mine, where 
the mill is now treating 70 tons of ore per day. The 
La Rose Consolidated will pay a 2V2% dividend on July 
20, making the total for this year 7%. The total dividends 
paid by this company amount to $2,954, 1S5. Exploratory 
work in the Keewatin on the 200-ft. level of the Coniagas 
has so far been devoid of results, and the vein which was 
followed on the first level for 150 ft. has not been picked 
up. Brush fires have been raging at Porcupine, but have 
done no damage aside from the destruction of cordwood. 
The new power-plant at the Hughes is in successful 
operation and shaft-sinking has been started. The Dome 
mine is reported to have reached a capacity of 10 tons per 
stamp per day. The Dome mill is crushing 8 tons per stamp 
per day, and the tonnage could be increased except that it 
would lead to scouring of the plates. The Hollinger has 20 
stamps dropping. 

Cobalt shows a steady increase in bullion shipments with 
an accompanying diminution in consignments of ore, with 
the Nipissing well in the lead. The total bullion shipments 
for the year up to June 7 were 2,146,778 oz., of the value of 
$1,250,146, the ore shipments being 8577 tons. 

MEXICO 

Sonora 

Five cars of ore have been shipped from the Abundancia 
to the smelter at Douglas and showed 5 to 17% copper. 
0. L. Neer and others have the property in bond and 
lease, and are planning the construction of a narrow road 
to simplify the freighting problem. The Tucabe mine, 50 
miles east of Magdalena, has been sold to an American 
company for $150,000, it is reported. 

High-graders who have been shipping ore from the 
El Tigre district to the I'nited States have been detected 
and the shipments captured. The ore is supposed to have 
come from the Cinco de Mayo and adjoining mines. The 
EI Tigre mine is making the largest output of its history. 
W. L. Rynerson has taken a lease of the El Temblor. Work 
has been resumed on the North Tigre by R. L. Brown. 

In a report mailed to the stockholders of the Lucky Tiger- 
Combination G. M. Co., May 25, it was shown that the 
net profits from the operation of the mine for the first 
four months of this year were approximately $45,000 per 
month. The net profit for the month of May shows a mate- 
rial increase, being approximately $75,000, of which $37,000 
was derived from the operation of the cyanide plant, which 
is now meeting the fullest expectations. The results of 
operations for the month of May were as follows : 



Tons. 

Crude ore concentrated 6183 

Tailing cyanided : 7728 

Estimated value of shipping ore 125 $ 30,000 

Estimated value of concentrate 280 64,200 

Est. value of bullion from cyanide plant. . 70,400 



Total value of May production , $164,600 

Less expenses, including cost of mining, milling, 
marketing, and general expense, but not includ- 
ing depreciation 87,000 



$ 77,600 

Less Kansas City general expense and interest on 
bonds 2,600 



Net profit for May 1912 $ 75,000 



Considerable high-grade shipping ore has been discov- 
ered on the fourth level of the Sooy vein. At the regular 
monthly meeting of the directors held on June 20 it was 
resolved that from this date dividends be declared monthly 
as the earnings may justify. 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



Personal 



Professional men are invited to send news of their engage- 
ments and travels. Such news is interesting to friends. 

I). C. Jackling is at Butte. 

W. C Orem lias -roue East. 

J. P. NEW BOM is at Iditarod. 

W. R. Bassick has gone East. 

Koy L. Mack is at High Grade. 

L. Lindsay has returned to San Francisco. 

T. Lane CARTER, of Chicago, is in Montana. 

F. Lynwood Garrison' is in San Francisco. 

E. P. Matiiewsox has returned to Anaconda. 

E. H. Clark was in San Francisco this week. 
A. P. Rogers was in San Francisco this week. 

F. H. Bostwick is in San Francisco this week. 
J. J. Collins is in London from North Nigeria. 

I). D. Mum, Jr., left for Seattle for Juneau, July 8. 
W. E. Simpson is at Fundicion de Los Arcos, Mexico. 
P. N. Moore has gone to the Yosemite and Los Angeles. 

G. I. Ada.ms will sail for China on the Tenyo Muru today. 
C. M. Eye was in San Francisco and has left for Mexico. 
C. 11. Macnitt is in London, having left Antofauasta. 

Chile. 

Henry B. Kaeding will be in New York for several 
weeks. 

H. V. Winchell will sail for Europe July 24, returning 
in October. 

George M. Ryall is in Mexico, but is expected in Los 
Angeles soon. 

L. D. Godshall was in Kingman, Arizona, recently and 
has gone East. 

E. P. Jennings has returned to Salt Lake City from a 
visit to the East. 

C. T. Nicholson is studying the dredging districts of the 
Yukon and Alaska. 

J. A. Agnew has resigned from the sen-ice of Bewick. 
Moreing & Company. 

J. F. Kemp has been elected a member of the American 
Philosophical Society. 

Coi'rtenay De Kalb is inspecting properties along the 
west coast of Mexico. 

M. \V. VON Bkrnewitz sailed from Auckland for San 
Francisco on July 5. 

Bailey Willis has returned from Buenos Ayres and is 
at Washington, U. C. 

John McDonald has resigned the management of the 
McEneany mine, at Porcupine. 

William Brewer was in San Francisco this week, but 
leaves Victoria the last of the moirth for Seward, Alaska. 

Charles O'Connell has resigned as manager of the 
Trethewey mine. Horace G. Young is now manager. 

R. T. Hill was in San Francosco on his way to Los An- 
geles. which is to be his headquarters for the present. 

F. R. Hi ll has resigned as superintendent for the Em- 
pire Mines Co.. and will be succeeded by E. S. Sheffield. 

R. H. Elliot was recently married and has gone to 
Telluride to be superintendent for the Liberty Hell G. M. 
Company. 



Obituary 



George M. Hill died at his home in Alameda on July 10 
at the age of 46. A mining engineer, he had been for 
some years interested in real estate, and recently had served 
with distinction on the Board of Harbor Commissioners 
of San Francisco. 



Market Reports 



LOCAL METAL PRICES 

San Francisco July 11. 

Antimony 11 — life | Quicksilver (flask) 43 

Electrolytic Copper 18— 18ic Tin 60— 51 Jc 

Pig Lead .6.00— 6.95c Spelter 74— 7|o 

Zinc dust, 1400 lb. casks, per 100 lb., small lots 19.60— 9.76; large 17.60— 8.60 



METAL PRICES 

(By wire from New York.) 

NEW YORK, July 11. — Copper prices in this market for 
the past week have been weak, despite the decrease in sur- 
plus. Lead, on the other hand, is firm, as is also spelter. 

Average daily prices for the past week, In cents per pound, 
based on wholesale transactions, standard brands, are given 
below. 

Electrolytic 
Date. Copper. 

July 4 Holiday. 

" 5 17.20 

" 6 17.20 

7 Sunday. 

" 8 17.10 

■' 9 17.03 

" 10 17.03 



Lead. Spelter. 

No market. 
4.76 7.10 
4.75 7.16 

No market. 
4.75 7.16 
4.75 7.15 
4.75 7.15 



Silver, 
per oz. 

614 
61 

61 

60J 

61 



LONDON QUOTATIONS 

(By cable, through the courtesy of C. S. Burton & Co., 
New York.) 

« July 11. 

Camp Bird Ltd 8 7 

El Oro 8J 

Esperanza 6} 

Oroville Dredging U 

Santa Uertrudls 7| 

Tomboy 6J 



COPPER SHARES — BOSTON 

(By courtesy of J. C. Wilson, Mills Building.) 



Closing prices, 
July 11. 

Adventure 8 7j 

Allouez 44 

Calumet A Arizona 73J 

Calumet * Hecla 615 

Centennial 23J 

Copper Range 56J 

Daly West 5 

Franklin 10] 

Granby 62J 

Greene Cananea, ctf. 9J 

Isle-Royale 33* 

La Salle 6| 

Mass Copper 6 



Closing Prices 

July 11. 

Mohawk 8 65 

North Butte 31 

Old Dominion 55 

Osceola 114 

Quincy 89 

Shannon 15} 

Superior A Boston 1J 

Tamarack 38 

TrLnlty I) 

Utah Con 10| 

Victoria 3J 

Winona 54 

Wolverine 107 



NEVADA STOCKS 

(By courtesy of San Francisco Stock Exchange.) 
San Francisco, July 11. 



Atlanta 8 .22 

Belcher 46 

Belmont 10.00 

B. 4 B. 07 

Booth 08 

Chollar 11 

Combination Fraction 16 

Con. Virginia 36 

Florence 1.10 

Goldfleld Con 4.00 

Gould & Curry 01 

Jim Butler 1 62 

Jumbo Extension 37 

MacNamara 23 



Mayflower 8 .02 

Mexican 265 

Midway 60 

Montana-Tonopah 2 57 

Nevada Hills 1.90 

Ophlr 1.00 

Pittsburg Sliver Peak 1.00 

Round Mountain 40 

Savage ll 

Tonopah Extension 2.02 

Tonopah of Nevada 6.50 

Union 45 

Vernal II 

West End 1.67 



MINING STOCK QUOTATIONS — NEW YORK 

(By wire from C. S. Burton & Co., New York.) 



Closing Prices. 
July 11. 

Amalgamated Copper 8 80S 

A. 8. 4 R. Co 81 f 

Braden Copper 6} 

B. G Copper Co 5f 

Chlno 30J 

First National 1J 

Glroux 5 

Goldfleld Con 4 

Greene-Cananea 9j 

Holllnger 13 

Inspiration 18j 

Kerr Lake 25 

La Rose _ 3J 

Mason Valley 131 

McKlnley-Darragh 13 



Closing Prices. 
July 11. 

Miami Copper I 26! 

Mines Co. of America 3 

Nevada Con 21 J 

Niptssing 7) 

Ohio Copper 1 

Ray Con 20| 

Tenn. Copper 43 

Tonopah Belmont 10 

Tonopah Ex , 2 

Tonopah Mining 6$ 

Trinity 64 

Tuolumne Copper 3J 

Utah Copper 60| 

West End If 

Yukon Gold ?! 



July 13, 1912 



MININu AND SCIENTIFIC PRESS 



67 



Metal Mining in Missouri 

The value of the mine output of silver, copper, lead, and 



zinc in Missouri for the calendar year 1911, according to 
J. P. Dunlop, of the "United States Geological Survey, was 
$30,171,311, compared with $28,086,887 in 1910, an in- 
crease of over $2,000,000. 



Production of Lead and Zinc in Missouri in 1911, in Short Tons 



District. 



Ore. 



Lead concentrates. 



Galena. 



Quan- 
tity. 



Value. 



Carbonate. 



Quan- 
tity. 



Value 



Zinc concentrates. 



Sphalerite. 



Quan- 
tity. 



Value. 



Silicate and 
carbonate. 



Quan- 
tity. 



Value 



Metal content. 



Lead. 



Quan- 
tity. 



Value. 



Quan- 
tity. 



Zinc. 



Value. 



Southwest Missouri: 

Alba-Neck City 

Ash Grove-Everton . . . 

Aurora 

Carl Junction 

Carthage 

Cave Springs 

Duenweg-Porto Rico . . 

Granby 

Joplin 

Oronogo 

Sarcoxie-Reeds 

Sherwood-Thorns Sta- 
tion 

Spring C i t y-Beef 
Branch 

Springfield 

Spnrgeon 

Stotts City 

Webb City-Carter- 
ville-Prosperity 

Wentworth and Barry 
County 

Zincite 



328 
51 
84 
69 
100 
31' 
2,39' 
623 
6,158 
1,491 
8 

641 

725 
230 
868 
44 

24,626 



119,508 
2,646 
4,076 
3,696 
5,500 
18,469 
133,201 
33,824 
325,885 
82,993 
400 

35,382 

36,974 
12, 203 
48,614 
2,400 

1,396,167 



15,995, $707,53; 



$962 



1,636 
1,512 



180 



10 
i06 



293 
'3,775 



101 



3,273 
4,610| 
2,471 
4,497 
10,550' 
4,330 
41,300 
10,173 
1,836 

12,603 

2,350 
900 
80 
820 

93,462 

485 
1,964 



122, 
189, 

98, 
196, 
649, 
152, 
1,050, 
425i 

70, 



Centra! and southeast Mis- 
souri 



38,861 
219,145 



2,167,502 
10,293,400 



234 



8,358 



217,699 
113 



State total: 
1911.... 
1910.... 
1909.... 
190S.... 
1907.. . 



258,006 
247,861 
249,151 
218,213 
193,528 



12,460,902 
11,286,7.50 
10,893,024 
8,629,039 
10,535,890 



234 

107 

385 
664 
357 



8,358 
6,385 
11,124 
18,220 
11,764 



217,812 
232,341 
229,023 
198,340 
222,347 



125 $2,100 
1,829 37,239 



221 1 4,882 



2,552 05, 860 
9,405 239,194 
1,707 36,488 



443,822 

74,946 
38,006 
2,700 
35, 472 

3,718,617 

19,885 
79,584 



,676,569 
3,990 



8,680,559 
9,342,139 
9,445,826 
6,800,359 
9,208,465 



2,372 
"400 



19,609 
510 



20,119 
23,826 
28,525 
20,601 
18,733 



21,447 

50,306 
8,' 137 



1'U 



262 


$23,580 


41 


3,690 


79 


7,110 


54 


4,860 


80 


7,200 


248 


22,320 


1,896 


170,640 


523 


47,070 


4,915 


442,350 


1,171 


105,390 


9 


810 


513 


46,170 


581 


52,290 


184 


16,560 


749 


67.410 


35 


3,150 


19,694 


1,772,460 



8,S20$1, 
41 

2,344| 
2, 479 
1,353 
2,411' 
9,695[ 1, 
5,693 
22,667] 2, 
5, 489 
1,326 



006, 164 
4,674 
267,216 
282,606 
154,242 
274,854 
165,230 
649, 002 
584,038 
625,746 
151,H.4 



6,202 707,028 

2,008| 228,912 

514j 58,596 

184 20,976 

451 51,414 



80 



7,200 



49, 282 

265 
1,052 



465,844! 31,114 
11,576 147,754 



2,800,260 
13,297,860 



122,282 
233 



477,420!l7S,868 
561,803 161,016 
677,213 159,435 
451, 607 144, 459 
427, m' 138, 675 



16.098. 120 122,515 
14, 169, 408! 129, 589 
13,711, 410[l30,162 
12, 134,5561107,404 
14,699,550 116,752 



5,618,148 

30,210 
119,928 



13,940,148 
26,562 



13,966,710 
13,995,612 
14,057,496 
10,095,976 
13,776, 736 



a In calculating the metal content of the ores Irom assays, allowance has been made for smelting losses in case of zinc, but not in 
the case of lead In comparing the values of ore and metal it should be borne in mind that the value given for the ore is that 
actually received by the producer, whereas the value of the metal iscalculated from the average daily quotations at New York and 
St. Louis. 



Tenor of Crude Lead and Zinc Ore and Concentrate, Southwest Missouri 



SOFT GROUND, a 

Total crude ore short tons 

Total concentrates in crude ore per cent 

Lead do. . 

Zinc do.. 

Metal content of crude ore do . . 

Lead do.. 

Zinc do.. 

Average lead content of galena concentrates do. . 

Average lead content of lead carbonate concentrates do. . 

Average zinc content of sphalerite concentrates do. . 

Average zinc content of silicates and carbonates do. . 

Average value per ton of galena concentrates 

Average value per ton of lead carbonate concentrates » 

Average value per ton of sphalerite concentrates 

Average value per ton of silicates and carbonates 

SHEET GROUND. 

Total crude ore .short tons 

Total concentrates in crude ore per cent. 

Lead do... 

Zinc do... 

Metal content of crude ore do. . . 

Lead do... 

Zinc do... 

Average lead content of lead concentrates do. . . 

Average zinc content of sphalerite concentrates do... 

Average value per ton of lead concentrates 

Average value per ton of sphalerite concentrates , 



3,275,705 
4.4 
.4 
4.0 
2.5 
.3 
2.2 
79.2 
47.6 
59.1 
35.9 
$51.06 
$32.41 
$39.40 
$23.58 



5,779,192 
2.6 
.4 
2.2 
1.6 
.3 
1.3 
79.9 
59.3 
$52.01 
$40.81 



3,217, 166 
4.5 
.4 
4.1 
2.6 
.3 
2.3 
79.9 
54.7 
58.9 
40.4 
$54.41 
$35.72 
$40.80 
$23.76 



4,944,910 
2.6 
.5 
2.1 
1.64 
.4 
1.24 
79.8 
58.6 
$56. 50 
$39.79 



a Including also the small production of lead and zinc ores in central Missouri. 



Tenor of Crude Lead Ore and Concentrate, Southeast Missouri 



Total crude lead ore short tons. . 

Lead concentrates in crude ore per cent. . 

Lead content in crude ore do 

Average lead content of lead concentrates do 

Average value per ton of lead concentrates 




1911 



3,974,712 
5.5 
3.7 
67.3 
$46.94 



68 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



The production of silver amounted to 49.807 tine ounces, 
valued at $26,430, an increase of 16,771 oz. over 1!)1(). The 
production of copper was 1)40.411 11)., compared with 04,47)2 
lb. in 1910. The quantity of lead concentrate produced in- 
creased from 248,058 to 258,240 short tons and the metal 
Content of the lead concentrate increased from 161,016 to 
178.S6S tons. The low prices paid for zinc concentrate 
during the first 10 months of 1911 caused a decline in the 
production of zinc. The output of sphalerite was 217,812 
short tons, compared with 232.341 tons in 1910. The pro- 
duction of zinc carbonate an.d zinc silicate concentrates was 
only 20.119 tons, which was less than in any year since 1907. 

There was an increase in ore mined in the southeast Mis- 
souri lead district. In the Joplin region the 'soft ground' 
mines produced about the same quantity of ore in 1911 as 
in 1910, but the output of the 'sheet ground' mines was 
about 800,000 tons less. A large amount of development 
was done in the Joplin region, and the high prices offered 
for zinc concentrate during the past two months of 1911. 
though too late to have much effect on the year's produc- 
tion, will probably cause much larger shipments in 1912. 
The production of silver, copper, lead, and zinc in Mis- 
souri in 1911 is shown in the following table: 



Production- ok Silver and Copper in* Missouri, 1910-11 



- Copper. 



Silver. 



rC 

= 
B 



s 



<! 

SB 



Year. 



v. ai 2 

~ — E. 

= < 



■- % 
- 

- - 

i- - 



1910 94.4.V2 .fll.O.V) 33.096 $17,872 35.002 

1911 640.411 S0.051 49.807 26.430 7)1,10!) 

In the foregoing tables showing the crude (or 'dirt') 
and concentrate from Missouri the ores of different nature 
have been segregated. For instance, the disseminated lead 
ore of southeast Missouri differs radically from the lead 
and zinc ores of the so-called 'soft ground' deposits of 
southwest Missouri, and these in turn differ from the 'sheet 
ground' deposits of the same region. Each class of ore has 
its peculiar problems of mining and ore dressing. This 
fact makes desirable the separate treatment of the statistical 
data. Generally speaking, the tables reflect closely the con- 
ditions of the industry. 



Silver in Peru 



It is reported in the Wat Coast Leader that the com- 
pany operating the Caylloma mine, in Peru, has been re- 
organized under the name of Sociedad F.xplotadora de 
Caylloma Consolidada, with a capital of £100.000 in shares 
of 5s. each. Reports from the mine are to the effect that 
on the No. 5 level a vein 20 in. wide and assaying 39(5 
oz. silver per ton has been discovered. The electric driven 
pumps on the sixth level have given such satisfaction 
that two more have been ordered. A deep drainage adit 
2600 metres long is now being driven to cut the vein on 
the eighth level. Progress in driving is at the rate of 
28 metres per month, and it is expected to increase it 
to 40 metres per month soon by the use of larger air drills. 



New construction- at South African mines is rather 
extensive just at present. Orders will soon lie placed for 
large additions to the concentrating plant of the Messina 
copper mine and to the plant of the Transvaal Coal Trust. 
Ltd. A new plant to handle pyritie ore will be built at 
the Mali Dyke gold mine, in the Pilgrim's Rest district, 
and additions and alterations will be made to the cyanide 
plant of the Benoni Consolidated, while at the Mystery 
mine, in Rhodesia, a complete new plant will be built. 
A mill of a capacity of 15.000 tons per month will be 
built at the Cam and Motor mines. The plant of the 
Sabi mine will be enlarged, as will that of the Cinderella, 
and the purchase of a small mill for the Rhodesia Gold 
Mining & Investment Co. is under consideration. 



Book Reviews 



Any of the books noticed in this column are tor sale by, 
or can be procured from, the Mining and Scientific Press. 

Business Law for Business Men, State of Califor- 
nia. By A. J. Bledsoe. Business Law Pub. Co., San Fran- 
cisco, 1912. For sale by Mining and Scientific Press. 
Price $4.75. 

This is the fourth in a series of manuals by the same 
author and covering the business laws of Oregon, Wash- 
ington, and New York. The books are designed, not to 
do away with the lawyer, but to give to the intelligent 
business man that general knowledge of the law which will 
enable him to avoid many troubles. It starts with 'Busi- 
ness Contracts and Legal Obligations' covering a wide vari- 
ety of topics from accident insurance to wholesalers' agents. 
Following this are chapters devoted to: Collection of Bills 
and Accounts; Notes and Mortgages; Attachments, Judg- 
ments, and Executions; Last Wills; Corporations in Cali- 
fornia; Bank Laws of California; Mines and Mining; 
Water and Water Rights; Administration of Estates of 
Deceased Persons; United States Bankrupt Laws; Auto- 
mobile Law of California; Taxes and Tax Titles; Trust 
Deeds; Assignment of Contracts, Guarantee of Accounts, 
and Powers of Attorney. The book contains a particularly 
complete table of contents, but no index. It is highly 
commended by the judges of the California supreme court. 

R kin forced Concrete BUILDINGS. By Ernest L. Ran- 
some and Alexis Kaurbey. McGraw-Hill Book Co.. New 
York. Pp. 235. Index. For sale by the Mining and Sci- 
entific Press. Price $2.50. 

The large number of competing methods for reinforced 
concrete construction that have come into vogue during 
the past few years have resulted in a great deal of con- 
fusion in the minds of possible users. Mr. Saurbrey pre- 
sents a history of the development of the use of reinforced 
concrete since its inception, together with an analysis of 
the basic patents, which in itself will be of great value 
to all engineers who desire to possess a thorough under- 
standing of the subject. The rational design of reinforced 
concrete buildings is extensively discussed, and is treated 
under the subdivisions of adhesion, compression, and lat- 
eral expansion, bending, transverse stresses, applications 
to the bending theory, initial and allowable stresses. Prac- 
tical construction is aiso treated at length, the first sub- 
division including materials of construction, floor estimates, 
foundations, finishing operations, fireproofing, and various 
repairs to existing buildings, accidents, superintendent's 
specifications, and the theory of beams. The theory and 
application throughout is comprehensively treated. The 
1 1< contains many tables and illustrations. 

The Ex Aii i nation of Prospects. By C. Godfrey Gun- 
ther. Pp. 222. ill., index. Pocket size, flexible cover. 
McGraw-Hill Book Co., New York. 1912. For sale by 
the Mining and Scientific Picas. Price $2. 

This book is designed to assist the engineer in the selec- 
tion of prospects worthy of purchase or development. It 
does not cover the general subject of mine examinations, 
though in the first chapter pertinent suggestions as to 
the essentials of such examinations are made. The main 
pari of the book is concerned with the geology of ore 
deposits, excluding iron and the non-metallic minerals. 
Properly enough, the greatest attention is devoted to the 
structural features of ores, followed by chapters discuss- 
ing primary and secondary ores and the criteria for their 
recognition, the forms of ore-shoots, and the characteris- 
tics of outcrops. The material has been carefully com- 
piled, well sifted, and is well illustrated. The criticisms 
of the author are well put and valuable. While the 
book will not do away with the need for a thorough ground- 
ing and continuous study of the literature of ore deposi- 
tion, it is much the best thing of its kind yet written 
and should do much to cultivate a sound discrimination 
in the selection of prospects. 



July 13, 1912 



MINING AND SCIENTIFIC PRESS 



69 



Decisions Relating to Mining 

Specially reported for the Mining and Scientific Press. 



Trespass on Lessee's Rights — Damages 

A lessee, who has the exclusive right to conduct mining 
•operations upon a tract of land for a stated period, cannot 
recover more than nominal damages from one who has 
wrongfully removed a part of the mineral, where it appears 
that the lessee would not, within the life of his lease, have 
reached the mineral so wrongfully taken. 

Chappel v. Foster, (Kansas) 123 Pacific, 870. May 
11, 1912. 



Patent Entky Canceled Because of Unexplained 
Delay 

An applicant for patent to a mining claim must pro- 
ceed with diligence to complete his patent proceedings; 
and where he has not prosecuted his case to entry until 
more than three years after the completion of the publica- 
tion of notice, and no satisfactory reason is given for 
the delay, the entry should be canceled. While a mineral 
■entry allowed on insufficient showing of title in the ap- 
plicant may be permitted to stand where the applicant 
subsequently acquires the complete title, he will not be 
allowed additional time in which to secure outstanding in- 
terests or to institute forfeiture proceedings against a 
non-contributing co-owner, where there has already been 
an unexplained delay of more than three years between 
publication of notice of the application of patent and 
■completion of entry. 

L. L. Squires et al., (Land Department) 40 Land De- 
cisions, 542. January 25, 1912. 



Oil Lands — Rights of Co-tenants. 

The holder of an undivided interest in oil land can ex- 
tract oil therefrom without his co-tenants concurring or 
participating. In case oil was not found he would have to 
bear the loss of his experiment and cannot call on a non- 
participating co-tenant for contribution. But if oil is 
found and marketed, the co-tenant requiring the working- 
tenant to account to him for his interest in the product, 
'measured by his interest in the land, must allow his pro- 
portion of t he necessary cost of producing and marketing 
the product. This reasonable expense would include the 
cost of machinery and appliances and other means neces- 
sary to production. In other words, all reasonable expenses 
incurred in the production and marketing would have to be 
deducted from the gross value before a division of the pro- 
ceeds between the co-tenants. 

Burnham v. Hardy Oil Co., (Texas) 147 Southwestern. 
330. May 8, 1912. 



Coal Lease — What Are Not Grounds of Forfeiture 

A lessor of a coal mine was held not entitled to declare 
a forfeiture of the lease because of the payment of in- 
sufficient royalties, where the lessee had made an error in 
his calculation of weights, but had paid each instalment 
in good faith and in belief that it was paid in full, and 
it was so accepted by the lessor at the time of payment, 
provided the lessee is solvent and willing to pay the amount 
of any shortage found by the court. A covenant against 
sub-leasing, when relied upon as grounds for forfeiture, 
will be strictly construed by the court, and where posses- 
sion of the mine was surrendered by the lessee to another 
company under a working contract, such contract will not 
be construed as an assignment entitling the lessor to de- 
clare the lease forfeited. Nor can a forfeiture be sustained 
for improper development of the property where the lessee 
acted in good faith, and the proper manner of development 
was largely a matter of judgment. 

St. Louis Union Trust Co. v. Galloway Coal Co., (Ala- 
bama) 193 Federal, 106. December 2, 1911. 



Concen trates 

Most of these are in reply to questions received by mail. 
Our readers are invited to ask questions and give informa- 
tion dealing with the practice of mining, milling, and smelting. 



QUICKSILVER is consumed mainly in the manufac- 
^ ture of fulminate for explosive caps, of vermilion, 
of drags, of electric lighting apparatus, of scientific appa- 
ratus, and in metallurgy in the recovery of gold and silver 
(principally gold) by amalgamation. 

gARITE is sold ordinarily in the crude state to mills. 

In the latter it is washed to free it from iron stains, 
then ground and treated with sulphuric acid. The prin- 
cipal production comes from Missouri and the crude ma- 
terial sells for $2 to .$4 per ton at the mine. After it has 
been treated in the mill it sells for $10 to $12 per ton. 
Higher prices are paid for the finest products, such as 
'extra ground and floated.' The market is mainlv in the 
East. 

A NTIMONIAL tailing presents much difficulty in cya- 
nidation and the following are the chief points to be 
watched, (a) The strength of the working solutions so that 
the selective action of the gold will be at a maximum while 
the solution of the sulphide of antimony is at a minimum, 
also the consumption of cyanide; (b) the amount of pro- 
tective alkalinity present; this must be such that the con- 
sumption of cyanide is kept down ; yet it must not be too 
pronounced, as in that case the solution may dissolve the 
sulphide of antimony and refuse to take up the gold pres- 
ent; (c) treating the pi-ecipitate, which always contains 
more or less antimony in metallic form; (d) the final pro- 
duction of clean gold. 

A/TACHINE-DRILL footage at the Ready Bullion mine 
of the Alaska United varies but little according to 
the character of the work. During the year 1911 the 
average footage drilled in the mine per 8-hr. shift was 
34.18. In stoping 32.71 ft. was drilled per shift, 34.91 ft. 
in cutting out, and 35.57 ft. in development. The ton- 
nage broken varies greatly, however, amounting to 57.7 
tons per shift in stoping, 16.94 in cutting out, and 8.64 
in development. The tons broken per foot drilled amounted 
to 1.764 in stoping, 0.485 in cutting out, and 0.242 tons 
in development. The average, found by dividing the total 
footage for the year by the total tonnage, was 0.95 ton 
per foot drilled. The average cost per shift was $8.59 
for labor, $2.88 for explosives, and $5.38 for supplies, 
power, etc.; a total of $16.85. The average cost per foot 
drilled was 49.2c, or 51.8c. per ton broken. 

"VITORK existing upon claims when located cannot be 
entered, except by fraud; for the applicant must 
make oath that work entered was performed by himself 
or grantors. Where the claimant re-locates his claim to 
prevent others from locating it through his failure to do 
the annual labor, it is believed, though there is no decision 
or ruling on that point, that he has lost all prior work for 
patent purpose. It may be said in favor of the claimant, 
when making his patent application, that he has actually 
performed the work he reports, and if there has been no 
intervening location, and his re-location being more a nomi- 
nal location, his rights date back to the first location on 
the principle of resuming work. Against him is the $500 
expenditure implying that the work must be done on the 
location entered for patent, and not under a former loca- 
tion ; also, that he should be penalized for trying to avoid 
annual labor by losing for patent purposes the work which 
he re-located. If the forfeiting owner has the right to re- 
locate his own ground just as a stranger would have, as 
the court held in one case reported, then he should have no 
patent rights to his old work, just as a stranger would not. 
At any rate, the claimant should resume work on his for- 
feitable location instead of re-locating; he should make 
amended locations instead of re-locations, whenever defects 
or changes of location are to be adjusted. 



7(1 



MINING AND SCIENTIFIC PRESS 



July 13, 1912 



Recent Publications 



Report of Inspector of Mixes of Kentucky, 1910. By 
C. J. Norwood. Pp. 379. Index, tables. Lexington, Ken- 
tucky, 1912. 

Coals of the Region Drained by the Quicksand 
Creeks. By F. Julius Fohs. Kentucky Geol. Sun-. Bull. 
No. IS, Serial No. 25. Pp. 79. Index, tables, maps. Lex- 
ington, Kentucky, 1912. 

Notes on Mining in Seward Peninsula, Alaska. By 
Philip S. Smith. Advance chapter from Bulletin 520, 
'.Mineral Resources of Alaska. 1911.' U. S. Geol. Sun-. 
Bull. 520-M. Pp. S. Washington, 1912. 

Quicksilver in 1911. Production and Resources. By 
H. D. McCaskey. Advance chapter from 'Mineral Re- 
sources of the United States, Calendar Year 1911.' U. S. 
Geol. Sun-. Pp. 35. Index, tables. Washington, 1912. 

The Turquoise Copper-Mining District, Arizona. By 
F. L. Ransome. Advance ehaper from Bulletin 530, 'Con- 
tributions to Economic Geology, 1911, Part I.' U. S. Geol. 
Sun-. Bull. 530-C. 12 pp.; maps, index. Washington, 
1912. 

Pseudostratification in Santa Barbara County, Cali- 
fornia. By George Davis Louderback. University of Cali- 
fornia Publications. Bulletin of the Department of Geol- 
ogy, Vol. 7, No. 2. 21-3S pp., plates 3-6. Berkeley, Mav 
25, 1912. 

The Postal Laws and Regulations Pertaining to the 
Second Class of Mail Matter. Form 3500. (Corrected 
to February 1. 1912.) Promulgated by authority of the 
Postmaster-General. 54 pp.; index. Washington, Febru- 
ary, 1912. 

The Earthquakes at Yakutat Bay, Alaska, in Sep- 
tember. 1S99. By Ralph S. Tarr and Lawrence Martin, 
with a preface by G. K. Gilbert. U. S. Geol. Sun-. Pro- 
fessional Paper 69. Pp. 130. Index, maps. ill. Washing- 
ton, 1912. 

A Colorimeter for Rapid Work with Widely Vary- 
ing Standards. By Charles H. White. Reprinted from 
th* Journal of the American Chemical Society, Vol. 
XXXIV. No. 5. 4 pp.; ill. Hanard University, Cam- 
bridge, May 1912. 

Gold and Silver in Idaho. By J. B. Umpleby, F. C. 
Calkins, and E. L. Jones. Advance chapter from Bulletin 
530, 'Contributions to Economic Geology, 1911. Part I.' 
U. S. Geol. Sun-. Bull. 530-G. Pp. 23.' Index, map, ill. 
Washington, 1912. 

Zirconiferous Sandstone Near Ashland, Virginia. 
By Thomas L. Watson and Frank L. Hess. Advance chap- 
ter from Bull. 530, 'Contributions to Economic Geology, 
1911. Parti.' U. S. Geol. Sun-. Bull. 530-P. 9 pp.; tables, 
index. Washington, 1912. 

Notes on the Northern La Sal Mountains, Grand 
County, Utah. By J. M. Hill. Advance chapter from 
Bulletin 530, 'Contributions to Economic Geology, 1911, 
Part I.' U. S. Geol. Surv. Bull. 530-M. 22 pp.; ill., 
index. Washington. 1912. 

Notes on the Clays of Delaware. By G. C. Martin. 
Clay in the Portland Region, Maine. By F. J. Katz. 
Advance chapter from Bulletin 530, 'Contributions to Eco- 
nomic Geology, 1911. Part I.' U. S. Geol. Surv. Bull. 
530-1. 24 pp.; ill., maps, index. Washington, 1912. 

Graphite Near Raton, New Mexico. By W. T. Lee. 
Mica in Idaho, New Mexico, and Colorado. By D. B. 
Sterrett. Advance chapter from Bulletin 530, 'Contribu- 
tions to Economic Geology, 1911, Part I.' U. S. Geol. 
Surv. Bull. 530-L. 22 pp. ; ill., index. Washington, 1912. 

Sulphur, Pvrite. and Sulphuric Acid in 1911. By W. 
C. Phalen. With Notes on the Manufacture of Sulphuric 
Acid from Smelter Fume at Ducktown. Tennessee. By F. 
B. Laney. Advance chapter from 'Mineral Resources of 
the U. S., 1911.' U. S. Geol. Surv. 30 pp.; tables. Wash- 
ington, 1912. 



Commercial Paragraphs 



The Ophir Consolidated Mining Co., Ophir, Utah, will 
make additions to its electrical equipment consisting of 
one 50, three 35, and one 15-hp. motors and three 50-kw. 
transformers. This apparatus will be supplied by the 
General Electric Co. The Homestake Mining Co., Lead, 
South Dakota, will add five motors to the electrical equip- 
ment in its mines. These consist of one 10, two 15, and two 
25-hp. motors, and will also be furnished by the General 
Electric Company. 

The Traylor Engineering Co., Allentown. Pa., reports 
that business is good, and that some of the orders re- 
cently received are as follows: Three sets of 'AA' extra 
heavy 42 by 16-in. crushing rolls for the Miami Copper Co., 
two sets of 36 by 16-in., and one set of 30 by 16-in. heavy- 
duty rolls for the Ophir Hill Con. M. Co.. a re-grinding 
plant for the United States mint. New York City, consisting 
of crusher. 6- ft. Chilean mill, driers, etc.: 18 water jackets 
constracted of American ingot iron for the Garfield Smelt- 
ing Co.; one heavy-duty jaw-crusher for the Nelson Con- 
tracting Co.; 32 water jackets for the Mason Valley mines 
Co.; a complete set of furnace jackets for the U. S. Smelting 
Co. constructed of American ingot iron: a set of IS by 10- 
in. heavy-duty rolls for the Ridgeview Sand Co.; a special 
fine jaw crusher for the Bedford Feldspar Co.; a set of 
water jackets for the Ducktown Copper Co.; 35 water 
jackets for Phelps. Dodge & Co.; a complete 200-ton amal- 
gamating, concentrating, and crushing plant for the Mc- 
Intyre Porcupine Mines Co. ; a No. 7 1 o-in. gyratory 
crasher for the U. S. Gypsum Co.; and many small orders. 

The O'Kelly safety hook manufactured by J. G. O'Kelly 
Co., Chicago, differs from others in that the load is carried 
from two points instead of one. The link or clevis not only 
keeps the load from slipping off, and the hook from straight- 
ening out, but supports one-half the load in conjunction 
with one leg of the hook. The other half of the load is 
carried by the flat -sided pin through the other leg of the 
hook. A slot in the up|>er end of the hook part of the 
device, with an enlarged or full circular portion at the 
bottom, admits the hook being raised, and then swung about 
the flat-sided pin as a centre. It will swing only when the 
pin is in the enlarged portion of the slot, consequently, 
after it is opened, the hook must swing into position before, 
it will drop and engage with its two points of support. 
All forces act in direct lines and there is no possibility of 
the hook binding. The centre of the load is in line with 
the centre line of the hook, therefore the hook must close 
and lock the instant any load is applied. Conversely, the 
hook cannot be opened until the load is released. 

The great importance of non-return boiler stop valves 
for use on a battery of boilers is universally acknowledged, 
and in some countries their installation is compulsory. It 
is evident that should a tube be blown out or a fitting be 
raptured in one of the boilers of a battery, the steam from 
the other boilers would rush into the header and discharge 
into the disabled one. An ordinary stop valve would here 
be inadequate, as considerable time would necessarily be 
consumed in reaching and closing the valve, and a certain 
amount of danger must be anticipated. The non-return 
safety boiler stop valve manufactured by The Lunken- 
ii etmer Co., Cincinnati, Ohio, has been given very severe 
tests, and is in use in a large number of high-pressure 
power plants, in all cases giving perfect satisfaction. When 
these valves are used, should an accident occur, such as the 
blowing out of a tube in the boiler or any rupture of the 
headers, shells, etc.. permitting the steam to escape, the 
valve will immediately close. The plant can be operated 
with the other boiler or boilers, without interference, there- 
by preventing the closing of same and the loss of time and 
money. This valve will prevent steam from being turned 
into a boiler which has been cut out for cleaning or repairs, 
as it cannot be opened by hand when pressure is on the 
header side. It can, however, be closed when desired. The 
I valve can be connected either horizontally or vertically. 



Science has no enemy save the ignorant. 



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TABLE OF CONTENTS 



EDITORIAL: 



Page. 

Notes 71 

California Miners Association 72 

Copper Prices and Surplus 72 

Financing the Institute 73 

ARTICLES: 

Silver Mining at Cobalt, Ontario ... Reginald E. Hore 74 

Cyanidation of Pyritic Ore F. B. Reece 77 

The New Metallurgy H. Stadler 78 

Kirunavaara H. V. Winchell 82 

Gold Mining in Korea J. D. Hubbard 83 

Western Mining Districts 85 

Tuolumne Table Mountain Augustus Locke 85 

Queensland Gold Production 85 

Marble Deposits of the Inyo Mountains 

Robert T. Hill 86 

Determination of Small Amounts of Platinum 

F. P. Dewey 87 

Estimation of Sodium Peroxide H. L. Easton 87 

South Dakota Metal Production 88 

Copper Output, 1912 88 

James Lewis & Son's Copper Report 98 

DISCUSSION: 

A Mountain of Gold T. A. Rickard 89 

The British Language Kalgoorlie Correspondent 89 

Free Use of Timber from Public Lands 

H. W. MacFarren 89 

-SPECIAL CORRESPONDENCE 90 

'GENERAL MINING NEWS 94 

DEPARTMENTS: 

Personal 99 

Market Reports 99 

Concentrates 100 

Decisions Relating to Mining 100 



EDITORIAL 



FOREIGNERS are returning to Mexico and south-bound 
trains and steamers are now well loaded. This is an 
excellent sign, as the men going back are those who know 
Mexico well. 



WESTERN metal mining is to receive serious consid- 
eration at the hands of the United States Bureau 
of Mines if the recommendations of the Senate committee 
stand. Amendments to the Sundry Civil bill made in the 
committee provide the $100,000 recommended by the secre- 
tary for investigation of technical problems relating to 
metal mining, and also make ample provision for mine in- 
spection in Alaska. It is to be hoped that the conference 
committee will allow these items to stand. 



PROTEST against change is to be expected, and the 
metallurgists who have been introducing stage crush- 
ing, filter-pressing, and other new features in Rand prac- 
tice have criticism to meet as well as praise. We republish 
this week an article by Mr. H. Stadler, printed first in the 
Rand Daily Mail, in which exception is taken to the prin- 
ciples advocated and claims for results on behalf of the 
metallurgists of the new school. We print this because it 
is interesting and the best statement we have seen of the 
position of those who cling to the old practice, and because 
the author feels that he has not had a fair opportunity to 
present his case before his local audience. Without enter- 
ing into the merits of this contention, we are glad to give 
the material to our readers. To metallurgists away from 
the Rand the essential question is whether or not the 
newly introduced methods do actually yield better results. 
At the proper time we shall hope to have something to 
sav as to this. 



CONVERTERS for the treatment of copper matte were 
first made of a shape similar to the bessemer con- 
verter, and the persistence of association of ideas of the 
two operations is so strong that reference is still made to 
the 'bessemerizing' of matte, though the action in the 
copper converter bears little resemblance to the converting 
of steel, beyond the fact that both are produced by blow- 
ing air through a molten mass. In the early converters 
the tuyeres were placed some distance above the bottom, 
with the idea of keeping them above the level of the cop- 
per formed in the operation. At the Copper Queen this 
plan was varied by making the longer axis of the con- 
verter horizontal, placing the tuyeres in a row on the near 
side, and by tilting the converter the incoming air was 
kept above the copper. Both types proved successful, and 
a semi-geographical distribution of form developed; the 
plants in the Southwest using the horizontal or Bisbee 
type, while in the Northwest the vertical or Anaconda form 
was preferred. Changes in practice have eliminated some 
of the early considerations, and the present-day converter 
foreman finds it difficult to believe that the preventing of 
the blowing charge from getting too cold was ever a prob- 
lem. At Great Falls the upright type has evolved into a 
converter 12 feet in diameter and about 15 feet high, using 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



air at 12 pounds pressure, as compared with the 0V2 
pounds of the early Bisbee form. The deeper column of 
matte and higher blast pressure is more effective to produce 
rapid oxidation, the circular cross-section gives much more 
effective support to the lining, and is more convenient to 
reline. Mr. E. D. Peters some time since prophesied an 
eventual return to the upright form of converter, and the 
recently announced intention to adopt the Anaconda form 
for new construction at Cananea, where the Bisbee type has 
been in use, is strong evidence of fulfillment of the 
prophecy. 



California Miners Association 

The California Miners Association is to be resuscitated. 
For many years this organization spoke authoritatively for 
the miners and mining industry of California and wielded 
a powerful influence. Through a series of county locals, it 
kept in touch with every part of the state and, with thought- 
fully planned and carefully executed campaigns, it brought 
to bear upon the State Legislature and upon Congress the 
force of informed public opinion in mining matters. The 
Association was organized primarily to help the hydraulic 
miners in their contest with the farmers. Its most im- 
portant single achievement was the securing of the passage 
of the Caminetti bill through which it was hoped that the 
revival of hydranlicking would be made possible. That 110 
such result followed does not detract from the credit due 
the Association in framing and securing the law. Its failure 
was in resting too easily upon well won laurels and allowing 
an effective fighting force to disintegrate until only a cor- 
poral's guard remained. The Association, however, made 
clear the fact that the mining industry can be organized 
on a democratic basis, and that when that is accomplished 
the opinion of the miners will command respect both at home 
and abroad. Mining men, if they will but settle their dif- 
ferences among themselves, can have anything in reason 
that they are minded to ask of Congress or the legislature 
of any Western state. They must, however, take into ac- 
count the whole industry, and their opinion, when ex- 
pressed, must be honest and reasonable. Facts are the 
most potent of arguments and an organization that can 
marshal facts will accomplish much. 

To achieve results of moment any such movement must be 
non-partisan and non-political. Whether a Democrat or a 
Republican be in the presidential chair is of less importance 
to most mining men than is the question of what constitutes 
the discovery necessary to legal location of a claim. Just 
what form conservation legislation is to take, may well 
mean more to a California oil man than the exact amount of 
the tariff on wool. Mining men should get together ami 
make their influence felt, but they should recognize that to 
do so requires a spirit of conciliation within, as well as 
without their ranks. The fact that the old California 
Miners Association did actually accomplish results, affords 
the best omen for (he new movement. 

The immediate occasion for again calling the Association 
together is the need for preparing for the Panama-Pacific 
Exposition. It is elemental that an exposition in San 
Francisco must excel in mines and mining, whatever may 
happen to other departments. It was the gold and silver of 
the Incas that first created a traffic across the Isthmus. It 
was gold that brought people to California and established 
industry on the Pacific Coast. California was known first 
and is known best as the Golden State, and if ever mining, 
and especially gold mining, is to be prominent in an expo- 
sition, it must be in 1915. It happens that gold mining is 
a non-competitive industry. The owner of a gold mine has j 
nothing personal to gain by advertising his wares. What I 



he gives to an exposition in the line of time, money, or 
material, he must give for the benefit of all, to promote 
general education, and with the hope of indirect gain only. 
It is therefore vital that the fullest cooperation of the 
mining men be secured if a successful exhibit is to be pre- 
pared, and anything less would be a reflection on the great 
primal industry of the West. In all this California does 
not stand alone. Nevada, Arizona, Utah, all the Western 
States, need development. They need more mines and they 
will benefit from stimulation of the mining industry. In 
each, as in California, there is little personal and direct 
interest in preparing an exhibit. Having all this in view, it 
is proposed to call a meeting of the Association sometime in 
November and to invite to it delegates from outside as well 
as inside the state. The first business will be to effect that 
cooperation with officials of the Panama-Pacific Exposition 
thai will assure making the mining exhibit at San Fran- 
cisco in 1915, not the largest, but the best exposition of 
mining ever brought together. That being accomplished, 
it is probable that the convention will turn its attention to- 
other problems since many of the more acute are sure to 
come up for consideration. A call for the meeting is being 
formulated and will be issued in a few weeks. The matter 
is ii^ the hands of a committee consisting of Messrs. Charles 
G. Yale, E. B. Braden, and W. C. Ralston, and the project 
is sure to be pushed vigorously and effectively. 



Copper Prices and Surplus 



Copper led the market in New York last week so far as 
public interest was concerned. The followers of the metal 
market in America have no way of speculating in the metal. 
In London speculators can traffic in copper warrants in 
much the same way as traders in this country can deal in 
grain and cotton. This fact makes London the speculative 
centre for metals, and when the sensational break occurred 
in the copper metal market last week, it made its appearance 
first in London. On Tuesday there was a drop of some Ci 
per ton, and later in the week quotations on this side went 
down from 17%, to I6V2 bid, 17 asked. The copper share 
list reflects the attitude of the public in that it has 
been much more sensitive on the decline than it has been on 
the advance in the metal. It was a foregone conclusion 
that any break in the market would be accompanied by ru- 
mors concerning hidden stocks of copper. This story has 
been put out in so many different forms and in each so 
strenuously denied, that in order to make the denial good 
the real explanation had to be brought to the surface. It 
is true that there has been no mention made in the general 
press of the requirements of the- European governments for 
war purposes, but there are now appearing tacit admissions 
of the piling up of blister copper at the refineries in un- 
known quantities. In a way it may be accepted without 
argument that this does not constitute a hidden stock of 
copper, but it does constitute a factor unknown so far as 
the consumer and the general public is concerned, and it 
does give to those who are in position to obtain inventories 
from the smelters a very great advantage. The consumers, 
especially on this side of the water, have for the past two 
or three years counted upon the production from the 'por- 
phyries' as a very important element and one that would 
bold the price of copper within reasonable bounds. It is 
true that blister copper cannot be counted as a part of the 
world's visible supply, but the consumer will certainly re- 
main unwilling to fill up his stock-yard at 16 cents or better, 
so long as there is a possibility of the refiners rushing an 
accumulation of blister copper into the market immediately 
after and disposing of it across the water at 13 cents or 
even lower, as was done two years ago. 



July 20, 1912 



MININu AND SCIENTIFIC PRESS 



73 



Much is being made of the labor conditions at Perth 
Amboy, but these conditions are hardly sufficient to account 
for the discrepancy between mine and refinery output. 
In reality the copper metal situation is in the hands of a 
.small circle of producers, smelter men, and refiners, and it is 
time that there is nothing to compel the producers to market 
their product any faster than they see fit,' or to manufac- 
ture the raw material except as they deem to their own 
best interest ; but the present move is the result of a huge 
manipulation which has not been carried to a successful 
•completion. In some quarters the attempt is made to esti- 
mate the amount of blister copper withheld at the refin- 
eries, and 100,000.000 pounds has been published as the 
total. In fact it would be almost impossible to compute 
Ibis correctly except by actual inventory at the various 
]:>lants. It would not be very difficult to arrive at a con- 
clusion by comparing refinery output with mine output if it 
were possible to secure a definite starting point. Inventories 
carry no meaning except as compared with previous in- 
ventories arnl in this case no previous inventory exists. If 
Abe tape tells the story, and that it does is one of the 
principal tenets of faith in Wall Street, the copper situation 
is not so rosy as most of the selling agents endeavor to make 
it appear. It is a significant fact that a great many of 
the leading copper shares are selling lower now than they 
<c!id two years ago when the metal was selling for 12Vo 
cents per pound. 

The July figures of the Copper Producers Association 
showed a decrease of 5,'J80,038 pounds in accumulated stocks, 
the copper surplus being 44,335,000 pounds, something less 
than 14 days output at the present rate of production. 
While absolutely no suspicion attaches to the figures given 
out by the Association, it is plain that market followers do 
not consider these figures as covering the real position of 
the metal. A great deal is said about the increased foreign 
demand for copper. As a matter of fact, the increase in 
exports has been almost entirely due to the needs of Ger- 
many, and the German situation is very far from satis- 
factory. Industrially the country is very much over-extended, 
and that Berlin finances are in a delicate condition is widely 
whispered among international bankers. The real salvation 
for copper lies in the resumption of constructive activity at 
home — the building of much needed hydro-electric power 
plants, the electrification of railroad systems — and it is plain 
to everyone that the political situation and the business 
■situation in this country are so interlocked that at present 
business interests are all playing politics. 



Financing the Institute 



Over a year ago the council of the American Institute of 
Mining Engineers proposed certain radical changes in the 
constitution and by-laws. Among these was a plan to in- 
crease dues of members. At the general meeting last 
February action on these amendments was deferred and a 
•committee consisting of Messrs J. F. Kemp, C. R. Corning, 
^George C. Stone, W. H. Nichols, Jr., and A. R. Ledoux, 
was appointed to investigate the affairs of the Institute and 
report whether an increase was necessary in order to main- 
tain the standard of work already set and to make due pro- 
vision for the future. The committee was charged with 
other duties, but for the present we are concerned only 
with the financial problem. The committee finds, in brief, 
that the Institute is living beyond its income and has been 
doing so for several years. The principal reason for this 
is the debt incurred when the Institute moved into its new 
quarters. It will be recalled that with practical unanimity 
the members voted to accept a share of Mr. Andrew Car- 
negie's gift of a building in New York, and assumed re- 



sponsibility for payment of $180,000 of the money neces- 
sary to purchase the ground. Of this amount $105,700 has 
been paid and $6000 subscribed; the money having been 
given by only 90 of the 4000 or more members. It is worth 
noting also that members living in the West have made no 
contribution to this fund. In the main we, speaking for 
the membership at large, have accepted the large gifts of 
the few, and have made no contribution of our own. In 
order to pay the remaining portion of the debt and interest 
by January 21, 1925, which allows one year for contingen- 
cies, 12 annual payments of $7884.81 will be necessary. 
Having in view the fact that the annual income of the In- 
stitute is now from $50,000 to $00,000, this does not seem 
a large amount to set aside for such a series of years. In 
fact, however, the committee finds that the Institute is not 
only not providing for these payments, but is running 
behind $2000 per year on current expenses, and has already 
used $18,708.76 of the accumulated funds on hand when the 
change of headquarters was made. The remaining surplus 
January 1 was $4231. 

The income for the year 1912 is estimated at $53,537. 
The principal items are: dues, $35,500; net advertising re- 
ceipts, $5000 ; sale of publications, $4000. The remainder 
are made up of extra charge for binding, life memberships, 
initiation fees, interest, and minor items. It will be noted 
that the expected income from dues is much less than the 
total found by multiplying the number of members by the 
rate for dues. The reason is that a considerable number 
have purchased life memberships and others are perennially 
delinquent. As no separate fund has been kept to cover 
the .receipts from life members, all such, and the delin- 
quent, involve an annual expense on the part of the In- 
stitute. This is estimated by the committee at $3.50 per 
person. The expenditures for the year, including the an- 
nual payment for the land, are estimated at $64,741. The 
principal items are: printing and binding, $19,557; salaries 
and clerical assistance, $18,054; meetings and stenographer, 
$1000; freight and expressage, $4500; miscellaneous office 
expenses, $1515; library, $3850; building expense, $4500; 
interest, $2960; annual payment on land, $7500. Taking 
into account the surplus, this leaves a net estimated deficit 
January 1, 1913, of $11,204. Faced with these figures the 
committee bad no alternative and made recommendations to 
the council and directors for economies which it is hoped 
will bring the expenditures down to the amount available 
for this year, whatever the Institute may decide to do as 
to the future. 

It is not to be taken from what has been said above, and 
the committee is careful to point this out, that the Institute 
as a business institution is insolvent. It has, in fact, 
property worth a half million dollars or more and an in- 
come which can be made to cover its necessary expenses. 
The United Engineering Building is a good investment. It 
not only affords admirable headquarters for the societies, 
but it dignifies the profession in the principal American 
city. When the land debt is cleared, the annual charge to 
the Institute will not be more than would need to be paid 
as rent for suitable quarters. It was expected that the 
land would be paid for by general subscription, and more 
than half the money has been so raised. Whatever may be 
the means adopted to secure the remainder, the total neces- 
sary, some $2 per member for a dozen years, is not large. 
In the meantime the Institute, as well as its members, faces 
the problem of increased cost of living. Some additional 
expense is inevitable from year to year. Other expenses, 
while extremely desirable, are optional, and where to draw 
the line is the problem for the Council and Directors. In 
making a wise decision the painstaking and candid report 
of the Committee of Five will be of the greatest assistance. 



74 



MINING AND SCIENTIFIC PRESS 



July 20. 1012 



Silver Mining at Cobalt, Ontario 



By Reginald E. Hore 



Cobalt mining companies in 1011 had a very successful 
year, and the district made new high records for both 
silver produced and profits earned. The output was 31,507,- 
791 oz. worth about $16,000,000. The profit made was over 



In spite of the large production during 1911, there is 
probably as much ore developed as a year ago, and a \arse 
production for 1012 is assured. A number of rich ore- 
shoots were discovered during the year, and improved meth- 




COBALT LAKE AND NIPISSING MILLS. 




NIPISSING MINE. 



$9,000,000. Dividend paying companies distributed 
$8,620,558, and two privately-owned mines made large 
profits. At the end of 1911 the silver mining companies 
had paid in dividends a total of $30,391,095. The output 
for producing years 1904-1911 was 125,571,980 oz., valued 
at about $65,000,000, and yielding to the mine-owners a 
profit of about $35,000,000. A noteworthy feature of 
1911 shipments was the falling off in the total tonnage, 
and increase in amount of concentrates and bullion. It is 
to be expected that the tonnage shipped will continue to 
decrease, while the proportion of concentrates and bullion 
will become greater. An important advance in metal- 
lurgical treatment is a process of amalgamation and cya- 
nidation being used at the Nipissing mine for winning the 
silver from high-grade ore. It is stated that in modified 
form this process can be successfully applied to the treat- 
ment of low-grade ore, and a mill is now being constructed 
for the purpose. In 1910 there were 14 mills in operation 
at Cobalt, and two additional ones were built in 1911. The 
Nova Scotia mill was to treat ore brought by aerial *raiu 
from the Crown Reserve, Kerr Lake, and Druinmond mines, 
but has been recently closed down. 



ods of' treating low-grade ore make it possible to now in- 
clude as reserves a large tonnage which was formerly of 
doubtful value. It must be kept in mind, of course, that 
each year's work leaves a very much smaller area to be 
prospected; but there is still a considerable area in which 




Fig. 1 



Table I. Silver Production, Cobalt Mines, 1904 to 1910 



o c 



-Shipments.- 



-Silver contents.- 

O 



Avg. silver 
cont.. per ton. 



-Value of silver shipments. - 
O O CO 



5 = 



1904 
1905 
1806 
1907 
1908 
1909 
1910 

Total 



4 

16 
17 
28 
30 
31 
41 



.102 



158 206,875 

,144 2,451,356 

,335 5,401,766 

,788 10,023,311 

,487 1,137 18,022,480 

,729 2,948 22,436,355 

,437 6,845 980.633 22.581,714 

078 10.930 980.633 81,123.857 

Table II. 



1.415,395 
3,461,470 

7.082.834 



980.633 
11.959,699 980,633 



1,309 JU1.887 

1,143 1,360,503 

1,013 3,667,551 

677 6.155,391 

736 1,244 8,468.293 $665,085 

809 1,174 10,809,872 1,651.704 

821 1.030 11,360.489 3,590.098 

795 1,094 $41,933,986 $5,906,887 



$111,887 

1,360,503 

3,667,551 

6.155.391 

9,133,378 

12.461.576 

$527,460 15.478,047 

$527,460 $48,368,333 



Concentration of Silver Ore, 1910 



Ore con- 
centrated, 

Name of mine. tons. 

Buffalo 39.038 

City .of Cobalt 9,367 

Coniagas 38,709 

King Edward 8,805 

La Rose 32,303 

McKinley-Darragh 43,279 

Nipissing 13,984 

O'Brien 25,687 

Temiskaming 21,683 

Trethewey 19,013 

Standard Cobalt 22,426 

Various other mines 31,275 

Totals 305,569 



Concentrate 
produced, 
tons. 
969.0 
214.0 
907.1 
152.7 
809.5 
1,922.3 
32S.6 
211.5 
653.1 
236.5 
310.0 
300.0 



Silver in 
concentrate, 
ounces. 

1,154,470 
201,802 

1,318,836 
87,549 
585.152 

1.615.46S 
381,155 
351,889 
529,099 
400,391 
141.458 
317,471 



Average silver 
in concentrate, 



per ton, 
ounces. 

1,203 
943 

1,486 
573 
783 
849 

1,017 

1.170 
811 

1,729 
473 

1.058 



Ratio of 
concentration. 
40 to 1 



43 
42 
62 
40 

22 
42 



33 
80 
74 
104 



7.014.3 



7.084,740 



Av., 1,030 Av., 43.5 to 1 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



it is reasonable to expect that some rich veins will be found. 
Aside from the rich ore there is certain to be mined a very 
large tonnage of low grade. 

The accompanying table, No. I, from the report of T. W. 
Gibson, deputy minister of mines, gives the results obtained 
in the years 1904-1910, and brings out the rapid increase 
in production of concentrates in the past few years. The 
ore milled averaged about 30 oz. per ton. Table II, also 
from Mr. Gibson's report, shows the results obtained by 
concentration in 1910. 



found, but there are apparently but few large faults. The 
nature of the smaller faults is indicated in Mr. Robbins* 
section of the McKinley-Darragh mine, Fig. 2. An inter- 
esting feature of recent explorations is the work being done 
along what is known as the 'big- 1 or Cobalt Lake fault. 
This, the only great fault which has been disclosed in the 
mine workings, is a thrust dipping to the east at an angle- 
of 62°. On either side there are minor thrust-faults dip- 
ping at low angles, and frequently displacing the veins for' 
a few feet. The actual vertical displacement along the big. 



W.N.W. £ 



E.S.E. 




KEEWATIN CONGLOMERATE SLATE 



Fig. 2. 



During the- year preparations have been made for ex- 
ploring at somewhat greater depth. There has been a re- 
markable disinclination so far to test some ground that seems 
not unlikely to contain ore at lower levels than the present 
workings. This delay is chiefly due no doubt to the fact that 
where the ore outcrops at the surface, the ore-shoots have 
generally failed at a depth of less than 200 ft. In most 
cases the decrease in value occurred near (he bottom of the 



fault is not known, but, as may be seen from Mr. Rob- 
bins' cross-section, Fig. 2, it is at least 300, probably 400, 
ft., and possibly much greater. From the cross-section it 
will be seen that at the McKinley-Darragh mine the ore- 
bodies are on the down-throw side, in Huronian sediments, 
and that there are no corresponding sediments remaining- 
on the up-throw side. They have evidently been eroded. 
At the north end of the lake, however, what is probably the- 




BATTERY, NORTHERN CUSTOMS MILL. 



HYDRAULIC PROSPECTING. 



Huronian formation, and the underlying Keewatin has pro- 
duced comparatively little. Since in nearly every case where 
the ore outcrops at surface, the Huronian is there com- 
paratively thin, the mines so far are all shallow. In some 
cases rich ore is found in the underlying Keewatin, but the 
shoots are usually less regular. 

The accompanying illustration, Fig. 1, showing the work- 
ings at the Coniagas mine, indicates the form of the ore- 
shoots in the case of deposits in Huronian sediments lying 
uneonformably on the Keewatin complex. It has been 
found that the ore pitches down in a direction parallel to 
the contact. It outcrops in places where the conglomerate 
is thin and the shafts and most of the workings up to date 
are thus situated. The result of development indicates 
that deeper ore will be found farther from the outcrop. 
The deposits are being developed by a step-like 'series of 
drifts and winzes. The valuable deposits being chiefly in 
the Huronian, it is not likely that the ore-shoots will con- 
tinue to great depths; but it is quite probable that some ore 
will be found a few hundred feet deeper than most of the 
present workings. 

1 In most of the mines numerous small faults have been 



same fault, shows Huronian sediments at the surface, on 
both up-throw and down-throw side. The ore deposits 
which have been worked here are on the up-throw side, and 
it is not unreasonable to expect that similar deposits occur 
at greater depth on the down-throw or western side. 

At the La Rose mine a winze is now being sunk to investi- 
gate the possibilities at greater depth. The main shaft at" 
the La Rose, after passing through about 150 ft. of Hu- 
ronian conglomerate and quartzite and about 50 ft. of 
Keewatin schists, cuts into Huronian conglomerate again.. 
This second conglomerate, while undoubtedly Huronian, dif- 
fers from that at the surface. It is characterized by numer- 
ous pebbles of gray chert. The conditions at the La Rose 
mine are illustrated by Fig. 3, which is based on a section 
described by W. G. Miller and C. W. Knight,* of the On- 
tario Bureau of Mines, and my own notes. Mr. Knight 
states that the vertical displacement at the La Rose mine is 
233 feet. Messrs. Miller and Knight t also studied the fault 
in the workings at Cobalt Lake, and found the structure to 
be similar to that at the McKinley-Darragh and La Rose 



♦Bulletin Canadian Mining Institute, Feb. 1912,' pp. 21-26. 
Wng. <C- Min. Jour., Sept. 30, 1911. 



76 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



mines. According to A. A. Cole, the fault was also found 
in the early workings at the Right of Way mine. Where 
first found there are Huronian sediments on both up-throw 
and down-throw side; but one is a coarse conglomerate and 
the other a greywacke with but few pebbles. Of deposits 
in the Keewatin series the most extensively worked are 




Fig. 3. 



those at the Temiskaming mine. The accompanying maps, 
Fig. 4, showing stoping on No. 1 and No. 3 veins up to 
December 31, 1911, illustrate the mode of occurrence of 
ore-shoots. The Keewatin series in which the deposits 
occur has been penetrated in some of the workings and the 
underlying diabase has not yet proved productive here. 



was cleared out and then the ore taken down by the aid of 
hand-picks. In this way a clean separation of vein matter 
from wall-rock was made in the mine. It was soon found 
that there are often several narrow veins running nearly 
parallel, and spaced only a few feet or a few inches apart. 
It then became necessary to break vein and rock at the same 
time. The high-grade ore then became intimately mixed 
with wall-rock, and it was necessary to pay more attention 
to sorting methods. The sorting was then done at the sur- 
face, on various types of tables and belts. The rich ore 
was picked out and the discard went on the dumps. 

The material on these dumps was found to contain quan- 
tities of recoverable silver, and in 1908, the treatment of 
low-grade ore was first extensively undertaken. In most 
cases it was found that rock taken from a few feet in either 
side of a rich vein contains enough silver to make milling 
profitable. This silver is not commonly disseminated 
through the rock; but occurs in the narrow crevices. 

The successful operation of the first mills led to the build- 
ing of several others, and when these were running, the 
companies that had taken out high-grade ore broke large 
tonnages of low-grade from the old stopes. In mining new 
ground the companies owning mills revised their method so 
as to break both high-grade and low-grade ore at once, and 
improved the methods of ore-sorting so that the finely 
broken particles of rich ore would not be left with the low 
grade. 

At f!ie Nipissing mine the present practice in mining is 
to sink a vertical shaft on the lode and to develop ore at 
levels less than 100 ft. apart. Drifts are run following the 
vein, which is kept well within the face. The drifts are cut 
wide and high. On the Meyer vein the drifts are 12 ft. 
wide and 14 ft. high; a 5V2-ft. cut being taken off with but 
one set-up. On most veins the drifts are 5^ to 6 ft. wide 
and 14 ft. high. In development work 2-man piston drills, 
and in stoping 1-man hammer drills, are used. In stoping, 
a filling system has been found satisfactory. The level is 




Fig. 4. 



The veins at Cobalt are nearly vertical, only a few 
inches wide, and usually in hard firm rock. In mining the 
ore in the early days it was the practice to break only 
enough of the wall-rock to make it possible to take out the 
vein matter. The drifts and stopes were often made so as 
to leave the vein standing on one wall. The broken rock 



protected by a lagging of poles laid on caps supported by 
posts. At intervals of about 25 ft. chutes are built in for 
drawing off the ore. The ore is then broken down onto the 
timber, and enough is drawn off to leave the desired space 
for miners. The rock on both sides of the vein is broken, 
and there is no sorting whatever done in the stope. The ore 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



77 



lies as it falls, and becomes intricately mixed before it 
reaches the surface. The conglomerate in which so great a 
part of the rich ore occurs, has a tendency to break into 
large pieces. These are 'buldozed' in the stope so as not to 
choke the 4-ft. chutes. 

From the chutes the ore is run into small cars. These 
are trammed to the shaft, hoisted in the cage, and trammed 
to ore pocket or mill stockpile, according to the tag placed 
on them in the mine. From the pocket the ore is fed auto- 
matically to a table. It first, however, passes over a plate 
perforated with l x /2-in. holes. The undersize goes to a 
trommel. From the trommel the fine goes to a Wilfley table 
and oversize to jigs. These jigs are of a type constructed 
especially for the ore by H. E. Kee, of the Nipissing mine, 
and are apparently very successful. All the ore which 
passes over the 1%-in. holes is washed by a sprinkler. The 
washings go through a screen to the Wilfley table. The ore 
passes to the table, where it is hand-picked by four or six 
men. The sorters pick out two grades — high and low grade 
— and the remainder goes into a chute, from which it is 
loaded into a car and taken to the mill-rock stockpile. Sand 
from the Wilfley tables passes into a simple dewaterer and 
slime is allowed to settle in tanks, the water being re-used. 



Cyanidation of Pyritic Ore 



By F. B. Reece 

The cyanidation of concentrates and of ores of high sul- 
phide content, has been described, and the difficulties at- 
tendant discussed, by J. W. Hutchinson, A. B. Parsons, 
Huntington Adams, and others. 

Some heavy sulphide ores which do not offer any special 
difficulties as regards excessive consumption of chemicals, 
and which yield a satisfactory extraction to cyanidation, 
give much trouble from a mechanical point of view. I was 
called upon to operate a plant, situated in a remote district, 
which had been designed and erected by others to treat an 
ore of this character, a mixture of arsenopyrite, pyrite, 
galena, and blende. The equipment consisted of stamps, 
tube-mills, cone-classifiers and thickeners, 'Brown' type agi- 
tators, and vacuum leaf-filters. Supplies and renewals took 
from four to six months from date of order to reach the 
mine. The valuable part of the ore was the sulphide, and 
to maintain the ore at a profitable grade it was necessary to 
sort it so that it contained from 20 to 25% of sulphides. 
Due to the necessity of using very soft local pebbles the re- 
grinding was not as fine as is desirable for the proper 
agitation of such material. On an average 90% passed 200 
mesh. 

The supply of air for the four 27V2 by 10-ft. tanks was 
inadequate. Allowing for the altitude, 7000 ft., it amounted 
to a total of 32 cu. ft. of free air per minute at 25 lb. max- 
imum pressure. It was found impossible to do more than 
agitate two tanks at one time, and continuous agitation was 
out of the question until additional capacity in air could 
be provided. The design of the central agitation pipe was 
faulty. It was originally 16 inches in diameter and was far 
too large, and set so low that there was only a 3-in. annular 
.space between the bottom of the pipe and sides of the cone of 
tank. This space would probably be too small to prevent 
choking while agitating a purely silicious slime, it was 
found to be quite inadequate for the material under dis- 
cussion. After long and expensive delays and when two or 
three charges had been lost, the centre pipes were replaced 
by others of 11 in. diameter placed so that their lower ends 
were 22 in. from the apex of cone, giving a clearance of 
about 7 in. between pipe and side of cone. 

Bernard MacDonald has drawn attention to the necessity 
of using the smallest air-lift tube consistent with the amount 
of liquid to be pumped. His opinions were certainly jus- 
tified in this case. Smaller pipes than 11 in. would probably 
have been advantageous, but none were available. 

Further, the suggestion put forward by Lloyd Kniffin of 
reducing the length of the central pipe, was carried out, 



leaving the pipe about two-thirds of its original length. 
These alterations caused a great improvement in the agita- 
tion. To assist in keeping the solid matter in agitation 
during the time of filling and emptying, two holes were cut 
in the lower part of centre pipe on opposite sides of 
pipe. The tendency to settle was much reduced by this 
simple expedient, and it was decided to cut two more holes 
about 8 or 9 ft. higher up, but unfortunately no opportunity 
was afforded for trying this experiment. The effect of these 
apertures on the cumulation of pulp was very noticeable 
as the level of pulp gradually rose during filling of a tank. 
It is questionable if they are an advantage after the tank 
is in full agitation, but this could easily be overcome in 
the manner suggested by Mr. Adams at the Natividad mill, 
where sliding doors were fitted on the central air-lift tube 
and opened and closed as the level of pulp in tank varied. 

Much trouble was experienced from the choking of the 
7j-in. air-agitation pipes which had not been provided with 
non-return valves. These pipes were the only means that 
had been provided for agitation, the usual side and 'spider' 
pipes not having been supplied. It was impossible to install 
these during the time of running covered by this article. 
The only remedy was to remove, clean, and replace this pipe 
after every stoppage of the air supply. To force this down 
again into the mass of settled slime the end of pipe was 
closed and drawn out to a sharp point. Two sets of Vs-in. 




IMPROVED AGITATION PIPE. 



holes were then drilled through the pipe, the lower set 
coming very close to the bottom of cone when the point of 
pipe rested on the apex, and the other set coming 3 in. 
above the intake of the central column. 

Discharging the tanks to pulp-stock tank by gravity was 
a tedious process on account of the lack of means of ef- 
ficiently agitating the charge to the last moment. The leaf- 
vacuum-filter employed gave poor results, as might have been 
expected in treating material of this weight. It was im- 
possible to prevent segregation and dropping of the bottom 
and heavier portion of cake. The only kind of filter to use in 
a case like this is a pressure-filter, making cake very rapidly, 
and preferably one which has no excess slime to displace. 
The solution of the difficulty in a case like the foregoing 
would appear to be the employment of mechanically driven 
classifiers and thickeners, of continuous agitation, pressure- 
filters, and a plentiful supply of air to the agitation and 
pulp-stock tanks. I am convinced from personal experience 
at the Hacienda Guadalupe, Pachuca, that it is not necessary 
to use the 'diagonal' method of connecting the tanks in 
series recommended by Mr. Grothe and Mr. Kuryla. The 
overflow method used by Mr. Adams gives excellent results, 
with more simple construction. , 

The foregoing experience shows how necessary it is to 
carefully design agitation plants to deal with material 
containing more than say 6 or 8% of sulphides. 

W. P. Lass* has described and illustrated a valuable device 
in the shape of an adjustable spider pipe, which can be 
lowered on top of a settled charge, to gradually bring it 
into a state of agitation. In agitating this heavy material, 
it is a great advantage to be able to remove the air pipes 
at will, as, despite all care that can be taken, choke-ups are 
not infrequent. Furthermore, a pipe which is in its correct 
position when the tank is in brisk agitation, may be quite 
unable to make headway against the depth of settled pulp 
which overlies it, when a tank has settled for more than a 
few minutes. It will be noticed in referring to the article 
by Mr. Lass that the central air-lift pipes are 10 inches in 
diameter for a 10-ft. diameter tank. Probably a still 
smaller pipe would be even more effective. 

*Mining and Scientific Press, Oct. 21, 1911. 



78 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



The New Metallurgy 

By H. Stadler 



In some recently published oversea papers, certain critics 
took exception to the following paragraph contained in a 
recent contribution of mine. 1 

"In face of the fact that the New Kleinfontein mine, run 
on conservative lines, with single-stage crushing (according 
to the annual reports for 1910), still holds the record in 
reduction costs, against two of the largest progressive mines, 
I cannot help feeling that metallurgical business on the 
Rand has become too refined, and that from the introduc- 
tion of the cyanide process to the present date very little, 
if any, real economical progress has been made." 

As a contributor connected with the Crown Mines accuses 
me 2 of being apt to flounder in my broader inference, I 
have collected data so as to produce conclusive arguments 
in place of mere impressions. I am now ready to say def- 
initely that practically all the metallurgical improvements 
introduced, and unduly boomed, during recent years have 
proved disastrous economic failures. The non-fulfillment 
of the promises made is one of the underlying causes of the 
steady fall in the value of the shares of our big mining 
companies. 

In the report of the committee of inquiry on the facts con- 
nected with the recent reputed fall in ore yield and recovery 
of gold from the East Rand Proprietary Mines, Ltd., and 
the causes which occasioned the decline in the shares of that 
company, I miss a paragraph of about the following 
tenor : 

"With inexcusable frivolity, immense sums were spent 
during recent years to remodel the old plants, and for their 
adaptation to the 'New Metallurgy,' which already had been 
proved to be based on utterly wrong premises. The only 
result of this expenditure was an increase in reduction costs 
of at least Is. per ton, remembering that certain facts (such 
as cheaper power and larger tonnages handled), which are 
not peculiarities of the 'New Metallurgy' account, in them- 
selves, for a considerable reduction. This shilling on 2.000,- 
000 tons per year, capitalized at 10%, itself accounts for a 
depreciation of, say, £1,000,000 in the share valuation." 

Fine Grinding and Extraction 
In order to review the position five or six years ago (be- 
fore the advent of tube-mills). I take the following repre- 
sentative fin'ures from Table C of the paper by H. S. and 

iJour. Chem., Met. & Min. Soc. of S. A., May 1911. 
-The Mining Magazine, July 1911. 



G. A. Denny "Rand Metallurgical Practice and Recent 
Innovations' given in Table 1, below. 

From these figures Messrs. Denny drew the logical conclu- 
sion that in order to get a total extraction of 95% (as far 
as these fields are concerned), it is theoretically unneces- 
sary. and in any case uneconomical, to grind ore beyond the 
point at which 58% passes 100 mesh. In view of the less- 
ened cost of plant, due to the possibility of quicker treatment 
of a 150-mesh product, they were rather inclined to think 
that all ore should pass 150 mesh, "as from an ore commin- 
uted to this extent 95 to 96% extraction should be con- 
sistently obtained." 

Instead <>t' building upon this sound foundation of con- 
scientious research-work and exhaustive data collected from 



Table II 



I.M.M. 
M*h. 


Residue 
Value on 
Grade per 
too. 


Sump and Tube Mill 
Combination. 


Single Stamp, 
1,600 Mesh. 


Weight*. 


Residue 
Value on 
Grades. 


Weights. 


Residue 
Value on 
Grade. 


Per tin. in. 


dwt. 


% 


dwt. 


% 


dwt. 


+ 60 
+ 90 
+ 200 
-200 


15 
07 

0-3 
02 


23 
9-8 
23-2 
64 7 


■0345 
■0686 
0696 
1294 


8-7 
165 
17 1 
57-7 


1305 
•1155 
0513 
1154 




Total ... 


100% 


■3021 


100% 


•4127 


Total Ext 


raction on 7-5 


dwt. ore ... 


96-0% 




94-5% 



test-runs on a practical mining scale, some Rand metallur- 
gists, with the motto: 'The finer the crushing the better 
the extraction,' rushed unthinkingly into an extravagant 
ultra-fine grinding policy, without regard to economic or 
other important considerations. In the keen race to beat 
metallurgical records, they have quite overlooked the 
following factors: 

1. The higher extraction claimed for finer grinding has, 
in consequence of mistaken deductions, been grossly exag- 
gerated. In criticizing my methods of efficiency calculation. 3 

3The Mining Magazine. September 1911. 



Table I 



Mesh. 



Weights. 



Screen. 
Av. 10869 dwt. 



Ass. Val. 
p. Grade. 



Individ. 
Extractn 



Final Pdlp. 

Av. 4 Kt!7 dwt. 



Ass. Val. 
p. Grade. 



Individ. 
Extractn. 



Residue. 
Av. 0801 dwt. 



Ass. Val. 
on Grade 

p. Ton. 



Total Value 
on each 
Grade. 



Total 
Extractn. 
on each 
Grade. 



Per lin. in. 



+ 60 
100 
150 
+ 200 
- 200 



p.c. 



dwt. 



p.c. 



dwt. 



p.c. 



dwt. 



3340 
1720 
771 
604 
35" 65 



5-5 
.100 
13'5 
18-25 
1460 



12 51 

53 66 
73*17 
7993 
6203 



481 
4'68 
362 
3*68 
555 



6976 


140 


84 40 


072 


9237 


0'2T 


9339 


(V24 


9204 


044 



100 p.c. 



Extraction by Amalgam, Extraction by Cyanide. 
55 22 p.c. 37 38 p.c. 

Total Extraction, 92 6 p.o. 



dwt. 



'484 
124 

•021 
015 
157 



801 



p.c. 



73 54 
9277 
97 95 
98'67 
9698 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



79 



A. Quartano, of El Oro, Mexico, again falls into the old 
blunder, already refuted, that the exposure of surface repre- 
sents the 'metallurgical value' of crushing work done. There 
is not the least objection to adopting this standard, pro- 
vided all other factors are reduced to this same unit, es- 
pecially the assay value, which is taken by weight (or 
volume), and varies therefore at a much slower rate than 
the surface exposed. From the statement made by E. H. 
Johnson 4 that the stamp and tube-mill combination produces, 
for the given cases, 9.5% more surface than single stamps, 
the impression is produced, perhaps unintentionally, that the 
'useful work' is increased in this same proportion. It fol- 
lows, however, from data in Table II, that, on the assump- 
tion of average values for the various grades the higher 
extraction obtained in favor of the fine pulp is only 1.5%, 
or 5.4d. in a 7.5 dwt. ore. This amount is hardly sufficient 
to repay the higher costs of finer grinding. 

2. One of the most important results of the research 
dork done by the Mines Trials Committee is, not the 
discoverey, but the realization, of the fact that any classifier 



4. The profit resulting from higher extraction by finer 
grinding is practically nullified by forfeiting the good effect 
which a higher percentage of extraction by amalgamation 
has on the total extraction. Crushing by impact in a mortar- 
box is much more adapted to free the pyrite and gold from 
the gangue, than the abrasive action of the tumbling contents 
of tube-mills, in which the particles are not broken up, but 
largely ground down by surface wear. The greater amena- 
bility to amalgamation of battery pulps is borne out by the 
fact that in Messrs. Denny's time, as well as now, an amalgam 
extraction of up to 70% was easily reached, while, where 
the mill plates have been discarded, this extraction has 
now dropped in most cases to 50% (South Randfontein 
Mines, 48.6%; East Rand, 50.11%). Besides the ad- 
vantage of quick realization of profits, a high extraction 
by amalgamation has a far-reaching effect on total extrac- 
tion, consequent on the lowering of gold contents left on the 
final pulp for cyanide treatment, where only 85 to 90% is 
recoverable under the best actual conditions. Assuming 
for argument's sake that it were possible to obtain an 



Table III. 





SINGLE STAMP CRUSHING. 


DOUBLE 


STAGE 


FINE GRINDING. 


GOLD RECOVERY 

PER TON. 


New Kleinfontein Co. 

1,200 mesh. 


Meyer & Charlton, 190S. 

400 Mesh. 


East Rand Propr. 


Mines. 


Crown Mine* 

(Regrinding by Double 
Stage Tube Milling). 


See Annual Reports, 


Grading 
p.c 

+ 60 If 


Output 1910 : 
466,882 tons 


Grading 

p.c 

+ 60 33 






Grading 
p.c 

+ 60 3 


Output 1910 : 
2,126,334 tons. 


Grading 
p.c 

+ 60 5 


Output 1910 . 
1,514,000 tons. 


1910. 


+ 90 2'1 
+ 200 14 
-200 46 


Estimated Ore 
Reserves : 
tons. dwt. 
1,397,412 6-46 


+ 90 17 
+ 200 14 
-200 36 






+ 90 10 
+ 200 23 
-200 64 


Estimated Ore 
Reserves : 
tons. dwt. 

13,950,277 5 4 


+ 90 15 
+ 200 12 
-200 68 


Estimated Ore 
Reserves : 
tons. dwt. 
6,282,719 7 6 




100 


Re- 
covered 


p.c. of 
Extract 


- 100 


Re- 
covered 


p.c. of 
Extract 


100 


Re- 
covered 


p.c. of 
Extract 


10(i 


Re- 
covered 


p.c. of 
Extract 




dwt. 


dwt. 


p.p. 


dwt. 


dwt. 


PC- 


dwt. 


dwt. 


p.c. 


dwt. 


dwt. 


p.c. 


Assay Value of Mill-Ore 


7 063 






10869 






7 008 






837 






Amalgam Recovery 


4454 


4 454 


6306 


4867 


4.867 


5^22 


3512 


3512 


50- 11 


5- 71 


571 


68'2 


Assay Value of Final Pulp 


2 609 






6 002 






3-496 






266 






Cyanide Recovery 


2233 


2233 


85-6 


5 200 


5200 


86-60 


2-996 


2996 


85 70 


235 


235 


88'3 


Assay Value of Residue 


0376 


6 687 




0'802 


10067 




,0-500 


6 508 




03 1 


8-06 




Total Extraction - 






945 






926 






9285 






962 





























with its overflow velocity well adjusted, acts as an efficient 
concentrator, in which the specifically heavier pyrite par- 
ticles tend to be retained in the underflow. Roughly, 
it may be said that the assay values of the -4- 60 and -f- 90 
grades in the overflow are halved, with a corresponding 
enrichment of the underflow. For instance, 10% of -|- 60 
grade of such an overflow, assaying 2.5 dwt., yields just as 
good an extraction as a 5% overflow, assaying 5 dwt. Those 
experienced in panning know how easily the segregation 
of pyrite from quartz can be disturbed and upset by hasty 
and maladroit movements, and it is therefore not surprising 
that partly banked up and disturbed classifiers are complete 
failures as concentrators. The abandonment of the old 
proved spitzkasten in series, in favor of cones in sets, with 
or without (he much-advertised diaphragm, is also an 
improvement of a retrograde kind. 

3. With the very fine final pulps now generally in use, 
it is no longer reasonable to take the percentages left on 
the -|- 60 grade as a criterion for the fineness of pulps. 
Besides the inaccuracy of screen measurements (which may 
amount to 2% and over), it must be remembered that some 
of the particles left on the -4- 60 grade are of an exceptional 
flat or long shape, and more amenable to chemical treat- 
ment than a similar volume of spherical form ; or they are 
specifically lighter materials, and of a nature quite different 
from the ore, since they carry neither pyrite nor gold. 

*Jour. Chem., Met. & Min. Soc. of S. A. ( July 1910. 



amalgam extraction of 90% from a low-grade ore, say 
5 dwt., the low residue value (0.5 dwt.) would make the 
cyanide treatment altogether unnecessary. The argument 
which has been advanced that the free gold, not extracted by 
amalgam, is caught in the cyanide works, though borne out 
by assays of residues, is "not conclusive. The maintenance 
of the accepted standard for residues, even with an en- 
riched final pulp, is simply a matter of more or less thorough 
treatment and therefore of cost. The actual facts are, that 
neither the East Rand nor the Crown Mines, with all their 
up-to-date and costly methods of treatment, have succeeded 
in raising the percentage of extraction by cyaniding much 
above the level of 85%, which is easily obtained all over the 
Rand. The extraction of the East Rand in 1910 was 85.7%, 
and on the Crown Mines 88.3 per cent. 

5. Metallurgical experts coming here from abroad should 
at once realize that, so far as these fields are concerned, 
grinding finer than the -\- 200 mesh is mere waste of energy 
and money. The reduction of the last few percentages of 
the -4- 60 grade by tube-milling cannot be done without th« 
stern necessity of simultaneously grinding down the rest 
of the pulp. The greater amount of over-worked slime 
unnecessarily produced inevitably demands more perfect 
washing and dewatering equipment in the cyanide works, 
with consequent additional working costs and additional 
capital expenditure for the machinery required to perform 
this unnecessary work. 



80 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



Working Costs 

Accounts and elaborate statistics, although admirably kept 
at all mines from a purely mathematical standpoint, fail 
entirely to give engineers any grasp of the true working 
costs of individual units of crushing equipment, or of the 
economic merits of innovations and improvements intro- 
duced. The variety of methods of accounting as practised 
on different mines, and the more or less arbitrary entries of 
expenses in accounts where they do not belong, make it 
practically impossible to get at really significant figures. 
For instance (during the transition stage in 1909), the 
books of one of the amalgamated mines of the East Rand 
show an amount of £2497 4s. 5d. under 'sundries', while 
at the same time another mine of about the same size is 
debited with only £12 .'is. under the same heading. More 
significant detail and greater uniformity are desirable. 

Mining expenses and development redemption are most 
variable factors in individual mining ventures. Their inclu- 
sion in the working costs brings a factor of great uncertainty 
into the statistics, rendering them useless for monthly com- 
parison. Would it not be better (as is the practice in many 



Capital Expenditure 

The ease with which money is forthcoming on the Rand 
for new innovations and inventions — if boomed enough — is 
no inducement to responsible engineers to pay any more 
respect to the reservoir of 'capital account' than that due 
to a waste-paper basket. At one time, however, W. A. Cal- 
decott was very anxious about the question of economy in 
capital expenditure. In heralding the revolution which the 
'New Metallurgy' would bring about in Rand practice, in 
1910, 5 he said : "This capital expenditure is likewise re- 
duced by the addition of such crushing units as tube-mills 
at half the cost or less than the equivalent even in heavy 
stamps." The metallurgical advisers of the East Rand, 
faithful believers in the new gospel, made Sir George Farrar 
say at the March meeting, 1910, that it was expected "to 
crush with 440 stamps more than now with the whole S20 
stamps with consequently much decreased costs." At the 
time when enthusiasm as to Mr. Caldecott's discovery was at 
its highest, we were led to believe that all that was necessary 
was to use coarse screens in the battery, and to buy so many 
tube-mills, at so much per dozen, to reap the promised profits. 



Table IV 



REDUCTION COSTS 

PER TON. 

See Annual Reports, 
1910. 


Single Stamp Crushing. 


Double Stage Fine Grinding. 


New Kleinfontein Co. 

Output 1910 : 
466,882 tons. 


East Rand Proprietary 
. Mines. 

Output 1910 : 
2,126,334 tons. 


Crown Mines. 

Output 1910 : 
1,514,000 tone. 


Mining and Development 
(excluded) - 

Crushing, Sorting, Convey- 
ing 

Stamp Milling - 
Tube Milling - 
Sand Treatment 
Slime Treatment 

Total 
General Charges - 

Total Reduction Costs - 


£ s. d. 

10552 
1 S-2S0 

1 0-376 
3-406 


£ s. d. 
not specified. 


£ s. d. 

8 
1 4 
7 

| 18 


3 10-614 
8110 


4 11-6 
6-2 


4 3 
16 


4 6-724 


5 5-8 


5 9 



other mining centres) to exclude mining and development 
expenses altogether from monthly statistics, and to keep 
separate suspense accounts for them, to be balanced up 
yearly or half-yearly ? This method leaves the management 
a free hand for a more efficient disposition of underground 
work. One month is evidently too short a time for the 
apportioning of costs of underground work. Mining and 
development expenses are not items suitable for monthly 
discussions by shareholders. They should be considered in 
connection with the position of the mine in general, of 
reduction costs, grade of mill ore and ore reserves, and dis- 
cussed at longer intervals on the basis of comprehensive 
interim reports issued by the Board. These reports should 
explain the actual position and outline the policy to be 
adopted in the near future. 

Mining and development costs apart, the purely industrial 
reduction costs are fairly constant all over the Rand, de- 
fending exclusively on the economical efficiency of the 
reduction work and reduction management. There exists 
some diversity in the apportioning of the general charges, 
which in some mines are to a larger extent included in the 
various items of working costs, but the general result, which 
shows about Is. per ton higher working costs for the 
'progressive' mines, can be taken as fairly representing the 
true position. 



By the irony of Fate, only one year and a half later it was 
Mr. Caldecott's privilege to discover that the capacity of the 
cyanide works at the East Rand was inadequate to deal 
with the increased proportion of slime, produced by the 
score of tube-mills. 

For technical purposes, the accounting of an industrial 
concern may be carried out with one of two ends in view. 
It may give a clear insight into all details of working costs 
and capita] expenditure, so as to enable those who desire 
true progress to judge new inventions and innovations on 
their economic merits. It may conceal blunders and failures. 
In either case, with very few exceptions, the annual reports 
give no details of the distribution of capital account and 
expenditure over the various units of the reduction plant. 
Consequently the amount of money spent in forcing the 'New 
Metallurgy' on the old plants cannot be even roughly esti- 
mated ; but the figures in Table IV are quite good enough 
to give an idea as to how far the promises of a reduction 
of capital expenditure "at half costs or less" have been 
fulfilled. 

Future Possibilities 

In order to prevent any misunderstanding, I want to make 
it quite clear, that in emphasizing the better economic ef- 

tJour. Chem., Met. & Min. Soc. of S. A., April 1910. 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



81 



ficieney obtained with the sounder and older methods, I am 
far from advocating a policy of stubborn conservatism, or 
preaching a dogmatic and definite doctrine of single-stage 
stamp crushing. On the contrary, I think multiple stage 
crushing should be practised in every rationally designed 
plant, so as to realize the advantages derived from inter- 
mediate classifiers. The use of tube-mills, for the purpose 
of grinding, is not in question, but rather their abuse. The 
abuse consists in transferring to them that part of the 
crushing work which can be more efficiently done with 
stamps. It has been proved experimentally that the me- 
chanical crushing efficiency increases with the coarseness of 
the battery mesh, and it appears that even a screen as coarse 
as 4-mesh is not the limit of highest efficiency. However, 
the advantage of a high amalgam extraction, got by double 
amalgamation, before and after tube-milling, is so marked, 
that to forfeit this advantage by crushing so coarsely that 
the mill plates have to be discarded, is not advisable, unless 
the extraction in the cyanide works can be materially raised 
above the present level of 85 or 90%. The use of fine 



noni Consolidated) is to be reground by the tube-mills, 
which will work at a high efficiency, because the 40 coarse- 
crushing stamps will provide them with the right amount 
of coarse material to produce the most suitable mixed feed. 
A high amalgamation extraction will be secured by double 
amalgamation of the mill pulp produced by the 180 fine- 
crushing stamps, before or after tube-milling. 

My remarks against the wisdom of the all-sliming policy 
refer exclusively to Rand ore and actual Rand practice, and 
may, under altered conditions, be reconsidered. Another 
case in which all-sliming may prove to be advantageous, is in 
adding free cyanide at the head of the tube-mill. H. F. 
Marriott 8 said in this connection that it had been demon- 
strated satisfactorily to those responsible for their system, 
that the gold in the ore passed into solution so readily during 
its normal course through the tube-mills, that there was not 
enough left undissolved to make it worth while to continue 
any subsequent treatment. This he (Mr. Marriott) believed 
had not yet been demonstrated on a practical scale on the 
Rand, but if it should prove only partly correct, and it 



Table V 



ROUGH ESTIMATE OF CAPITAL 



Invested in STAMPS and TUBE MILLS. 

(Monthly Analysis of Chamber of Mines, 
31st December, 1910.) 



Esti- 
mate 
of Cost 
per 
Unit. 



Single Stamp 
Crushikg 

(1,200 mesh.) 



New Klein- 
fontein Co. 
Output per year, 
1910: 
466,882 tons. 



No. of 
Units at 
Work. 



Total 
Value. 



Double Stage Fine Grinding. 



East Rand Pro- 
prietary Mines. 

Output per year, 
1910: 
2,126,334 tons. 



No. of 
Units at 
Work. 



Total 
Value. 



Crown Mines. 
Output per year 

1910: 
1,514,000 tons. 



No. of 
Units at 
Work. 



Total 
Value. 



STAMPS (say 1,450 lbs.) erected, including 
Motor, Ore Bins, Amalgam. Plates, 
Building, etc., complete 

TUBE MILLS (22ft. x 5ft. 6in.) erected, inclu- 
ding complete Tube Mill Circuit (Motor, 
Classifiers, Pumps, Launders, Amalgam. 
Plates, etc.) 

Total Costs of Stamps and Tube Mills 
Do. reduced to tonnage of Klein- 
fontein Mine 



230 



3,000 



220 
(Duty 
5.9 t.) 



50,600 



820 
(Duty 
7 82 t.) 



25 



188,600 



75,000 



675 
(Duty 
7-6 t.) 



18 



155,250 



54,000 



50,600 
50,600 



263,600 
57,880 



209,250 
64.540 



screens will, therefore, be advantageous, even at the cost 
of a possible loss in mechanical efficiency. With classifying 
well carried out, the suitability of the type of tube-mills 
adopted as a standard on the Rand is doubtful. Other crush- 
ing machines may prove more efficient and should be given 
a trial. It is to be hoped that the tests of the Hardinge 
mill, now going on under the auspices of the Central Mining 
& Investment Co. at the Village Deep, will be more 
thorough and exhaustive than those of the Nissen stamp 
recently carried out by the same company. A. E. Crosse's 
regrinder (a drum revolving round a central axis with sliding 
mullers inside) also warrants testing and holds out promising 
prospects. 

A great fuss was made when it became known that the 
New Kleinfontein company is deciding upon an increase of 
capacity of their reduction works, in order to deal with a 
further quantity of 10,000 tons per month (25% increase) 
had gone over to stage crushing. The methods adopted, on 
the advice of the consulting engineers — progressive in their 
conservatism— are, however, in no way a negation of their 
policy as hitherto practised, but only a logical combination 
of both methods in perfect accordance with theory. Of the 
220 stamps only 40 will be made responsible for the increase 
of output. These will crush through the coarsest screens, 
while the remaining ISO stamps will crush, as hitherto, 
through fine screens. The underflow of the total pulp (run 
into classifiers of the type successfully adopted at the Be- 



were found possible to effect satisfactorily the rearrangement 
of solution circuits, it would eventually lead not only to a 
modification of our great cyanide plants, but probably to a 
tandem tube-mill and the doing away with the cyanide plants 
altogether. 

The investigation of this question was contemplated in 
connection with the Giesecke mill tests, but unfortunately, 
from commercial considerations, they were dropped, on the 
ground of the non-fulfilment of the expectations of me- 
chanical efficiency. The above figures refer to the two prin- 
cipal units only. Spare tube-mills and other expensive 
innovations, such as filter-tables and vacuum-filters, are in 
no way taken into consideration. 

Conclusion 

The bare facts, revealed by the annual reports of our 
largest producers, show that all this enormous capital ex- 
penditure, which has not even yet ended, has only increased 
reduction costs. The actual results, far from fulfilling those 
promised, fall short even of those obtained five years ago, 
if due allowance is made for the progress attained in direc- 
tions 'which have no direct connection with the 'New Me- 
tallurgy'. The figures, published in Messrs. Denny's paper on 
the extraction percentages obtained at that time on mines 
of the Central Rand, with battery pulps as coarse as 20 
mesh, leave no room to doubt that the East Rand Mines 

oBull. Inst. Min. & Met., 81, June 1911. 



82 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



Gould at once reduce their reduction costs considerably by 
simply returning to the sounder economical methods of the 
older days. There is no earthly reason to prevent this mine 
and the Crown Mines reaching an economical ellieiency equal 
to that of the New Kleinfontein mine, which is run on old- 
fashioned lines without any tube-mills at all. The much 
abused excuse that the different nature of the ore is re- 
sponsible lor the poor results obtained is hardly borne out 
by the records tiled at the reduction offices, and if any 
considerable prejudicial effect of this kind were proved it 
would yet be more than balanced by the advantage of the 
enormously larger tonnage dealt with. 

In face of this array of facts, it would be highly interest- 
ing if W. A. Caldecott or F. L. Bosqui. the most prominent 
exponents of the new school, would explain why it is not 
desirable to go back a few years, and. with the experience 
now at our disposal, make a fresh start on the sound basis 
of actual knowledge gained by the eminently useful research 
work carried out by the Mines Trials Committee. 



Kirunavaara 



By H. V. Wixchell 

*This mine is in Swedish Lapland, and is called Kiruna- 
vaara or Ptarmigan mountain. It has been opened and put 
in operation during the past ten years under the manage- 
ment of a Swedish 'captain of industry' named Hjaliuar 
Lnndbohm. Here within the Arctic circle, north latitude 67°, 
where the electric lights are started at 2 :30 on winter after- 
noons, are 1200 men mining iron ore for shipment to Eng- 
land. Germany, and the United States. The daily output 
is about 9000 tons : and it is shipped over a first-class 
modern railroad in steel ore cars about 100 miles farther 
north to the harbor of Narvik on the Norwegian coast. 
Narvik is the most northern ice-free port, and railway sta- 
tion. Here every day in the year iron ore is loaded on 
vessels at a latitude north of Cape Nome; such is the 
powerful influence of the Gulf Stream. 

The amount of ore in the Kirunavaara has been repeat- 
edly estimated; and each time the estimate is larger. When 
it is realized that this deposit of hard ore averages about 
275 ft. in thickness and is more than two miles in length, 
and rises in a mountain about S00 ft. above the surrounding 
country, it may not be so difficult to believe that it contains 
approximately one billion tons of iron ore. 

It is mined in open cuts or terraces;;; and the blasting 
can be heard for 50 miles. The annual output of ore now 
amounts to about three million tons. It is limited by the 
Government at present to 3,500,000 tons. The Swedish gov- 
ernment not only owns one-half of the stock of the operat- 
ing company, but has an option to purchase the remaining 
half at an agreed price in about twenty-three years' time. 

Although attention has been repeatedly called to this 
mountain of iron by Laplanders and hunters returning from 
the far-away northern wilds, yet very little was known 
about it until the Swedish Geological Survey and Mr. Lnnd- 
bohm camped there and collected material for reports. The 
first visit was in 1875 and the second in 1S96. Situated 
about 145 kilometres north of the Arctic circle, 300 kilo- 
metres from Lulea on the Baltic, and 170 kilometres from 
Narvik, the distance from Stockholm is 1413 kilometres, or 
about 850 miles. The first work preparatory for mining 
was in 189S. In 1S99 the railroad (owned by the Govern- 
ment) reached Kiruna, and in 1902 was built to Narvik. 
Shipments began in 1903 with a production of about 
800,000 tons. 

Kiruna is situated in a desolate country, uninhabited be- 
fore mining began, and only periodically visited by the no- 
madic Laps, lor hundreds of years the only dwellers in the 
district. The climate is severe, the yearly average temper- 
ature being 30° F. Winter lasts from the first of 

♦From a report on the Stockholm meeting of the Inter- 
national Geological Congress, made to the Minnesota 
Academy of Science. 



October to the end of May. and the snowfall is heavy. 
Kiruna is now a well-built town of about 7800 inhabitants. 
An electric railway carries the miners to the foot of the 
mountain, and covered tramways or inclines take them up 
to the working faces. Hitherto the work of quarrying the 
ore has not been attended by any unusual problems, but as 
deptli increases and the amount to be mined becomes more 
nearly equal to the tonnage of ore. there will be an oppor- 
tunity for the display of engineering skill of a high order. 
The average dip of the ore is about 55° to the east, and the 
foot-wall rock as well as the hanging is already being mined 
in considerable quantity. 

The ore is massive and dry. and the rocks above and be- 
neath are likewise solid and fresh crystalline rock. Hence, 
the ground stands well and only an occasional pillar is 
needed even in large excavations. The grade of the ore is 
high. Indeed, these Swedish ores constitute one of the most 
important sources of high-grade ore in sight today. The 
chief impurity is phosphorus in the form of apatite. This, 
however, is so plentiful that instead of being detrimental it 
becomes an important asset. By the use of the Thomas- 
Gilchrist process the phosphorus is saved and converted into 
phosphoric fertilizer. Indeed, the Germans pay about as 
much for a unit of phosphorus as for a unit of iron. The 
ore thus far produced from this far northern mine has 
averaged as follows: 



Grade. 


Tons. 


Fe. 


P. 


A 


1,141.302 


69.63 


H.II24 


B 


67,387 


69.25 


0.67 


c 


371,854 


68.60 


0.162 






62.48 


1.88 


F 


278,900 


59.34 


2.78 


G 


708,036 


57.77 


3.09 



The amount of titanic acid in the ores is generally less 
than 0.5%, and the sulphur averages 0.05% or less. 

But little is known concerning the geological age of the 
Kiruna ore and the surrounding sedimentary and igneous 
rocks. They are presumed to be pre-Cambrian and post- 
Archean. The geology of the ore deposits is complex and 
most interesting, and has been made the subject of careful 
study by Messrs. Lnndbohm and Geijer. 

It is a remarkable fact that the great orebodies of Kiruna- 
vaara, and Luossavaara. which lies a mile or two farther 
north, almost in line of strike, occur between two beds of 
porphyries of rather acid composition. The foot-wall con- 
sists of syenitic rocks with a silica percentage of tbout 60, 
the hanging wall of quartz porphyries with about 70% silica. 
The quartz porphyry is interwoven with innumerable dikes 
of finely crystalline apatite, generally small, but sometimes 
more than one metre in thickness. These dikes are often rich 
in magnetite and hematite. They also often contain much 
tourmaline and sometimes quartz and albite and show flow 
structures and orientated intergrowths. The quartz porphyry 
on the eastern side of the ore also contains numerous frag- 
ments of magnetite similar to that in the iron mountains. No 
dikes of magnetite are found cutting the quartz porphyry; 
but many intersect the syenite on the west. The contact be- 
tween ore and country rock is generally sharp and distinct. 
The ore chiefly consists of magnetite, but contains hematite 
in small irregular lumps, in isolated crystals, and in small 
veinlets. The ore is sometimes laminated and intimately 
banded with alternating layers of apatite. Some geologists 
have mistaken this structure for evidences of sedimentary 
origin. 

According to the two main theories, this ore is either 
pneumatolytie-hydrothermal or magnetic. It occurs in a series 
of bedded eruptives; is younger than the underlying syenite 
porphyry and older than the overlying quarts porphyry. It 
was, therefore, formed either by gaseous emanations from 
the older rocks during an interval or pause in the outpouring 
of solid eruptive matter, or is an actual eruptive sheet or 
dike of magnetite from an acid magma. In either case it is a 
deposit of rare type and phenomenal importance. I have 
purposely refrained at this time from advocating either 
theory . 



July 20, 1912 



MINING AND SCIEN TIFIC PRESS 



83 



Gold Mining in Korea 



Br J. D. 

The Oriental Consolidated Mining 'Co. still holds first 
place in Korea as to output. For the fiscal year ended 
July 1, 1911, the company mines produced 344,097 tons of 
ore valued at $5.19, or $1,787,628. The total receipts for the 
year were $1,541,347; total operating costs $839,857; and 
the operating profit for the year was $701,488. On new con- 
struction and development work, $28,768 was expended. 
The net receipts over all expenditures for the year were 
$672,720, and the surplus was increased from $532,791 to 
$561,426 during the year. From the granting of the con- 
cession to 1912 the company has produced over 2,600,000 



PRINCIPAL MINING CONCESSIONS, KOREA. 

tons of ore, valued at over $16,000,000. Alf Welhaven is 
general manager in Korea, G. M. Ford is general superin- 
tendent, and A. E. Drucker consulting metallurgist. During 
1911 the company paid dividends of $644,085 on the net 
capitalization of $4,293,900. H. C. Perkins of New York 
City is president of the company. 

The ore reserves on July 1, 1911, were estimated as 
follows : 



Mine. 


Tons. 


Gold Content. 


Tabowie 


410,000 


$2,000,000 






1,302^000 




13,000 


51,900 




35,700 


79,350 




47,000 


297,000 




11,580 


124,520 


Totals 


802,2S0 


$3,584,770 



All the mines of the Oriental Consolidated are in good 
shape, except the Kuk San Dong and Chintui, which are 
about exhausted of pay ore. The increase in the value of 
the ore reserves in the other mines, however, offsets the 
decrease in the Kuk San Dong and Chintui mines. 

During the past year the new cyanide plant, designed 
and erected by A. E. Drucker, at Kuk San Dong for the 
regrinding and retreatment of the concentrate dumps from 



Hubbard 

the leaching vats of the old cyanide plant, was put into 
successful operation. The net extractions by the old per- 
colation treatment have been quite high during the past 
few years, but unquestionably can be bettered by modern 
treatment, and the cost of treatment lowei-ed. This con- 
centrate dump retreatment is rather a new departure in 
cyaniding, and Mr. Drucker's experience will be awaited 
with interest. The Oriental Consolidated is to be con- 
gratulated on this effort to bring the plants up to date. 
Heretofore the methods used have been antiquated. It must 
be borne in mind however that this was the first mining 
company in the Far East to successfully treat low-grade 
ores, and its pioneering has helped other successful 
companies in getting started. 

Last year this company had" much trouble over the 
matter of cordwood and mine timbers. A large amount of 
both is required and the company has practically exhausted 
the visible supply within the limits of its concession. They 
commenced to cut wood and timbers outside the limits of 
their concessions, and being perhaps inconsiderate of the 
rights of other concessional, were stopped by the authori- 
ties, upon complaint of those trespassed upon. As cordwood 
and mine timbers are necessary for the operation of gold 




TARACOL HEAD-FRAME, ORIENTAL CONSOLIDATED. 



mines, and as the Japanese government has heretofore 
always encouraged the development of mines in Korea, 
deriving revenue therefrom, thei-e is no doubt but that the 
matter will be adjusted to the satisfaction of all concerned. 
It is unfortunate that "the Oriental Consolidated did not 
do some reforestation many years ago, especially as the ore 
reserves have always been developed so far ahead as to 
prove a good life to the mines. It is not yet too late, for 
the company is still good for many years of productive life. 

The Seoul Mining Co., operating mines at Suan, in Hwang 
Hai Do province, has had another successful year. The 
40-stanip mill was completed December 1, 1909, and has 
been in continuous operation ever since. During 1911, 
70,229 tons of ore was crushed (an average of 5.53 tons 
per stamp per day), from which an average recovery of 
$7.85 was made, at a working cost, including development, 
of $3.01. This cost is divided as follows: Mining, $1.25; 
milling, $0.62; transportation, $0.05; concentrate expense, 
$0.24; general expense, $0.85. The mill recovery was $6.21 
per ton; concentrate $1.62 and from ore sales to the 
Tacoma smelter $0.02 per ton. The last item represents 
an adjustment in 1911 on shipments made in 1910, as no 
high-grade ore was shipped during the year. The average 
extraction obtained was 79.1% of the gold and 18.4% of the 
copper content of the ore, or 69.4% of the total. The 
greatest loss of copper is in the slime, and investigations 




84 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



are under way to increase the saving. Microscopic exami- 
nation has shown that the bismuth is closely associated with 
the copper and exists in a finely disseminated state, probably 
as native bismuth. 

The ore reserves on January 1, 1912, are- estimated as 
follows : 

Bismuth, 

Oreborty. Tons. Gold. Copper, lb. Gross Per 

%. per ton. value. ton. 

Eastern 191,400 $10.58 1.3 3.50 J3.O24.000 $15.80 

Central 5.000 20.00 3.0 12.00 172,000 34.40 

Western ... 15.000 13.50 1.8 4.00 303.000 20.22 

The net returns from mining and milling operations for 
the year was $339.S44. During the year two dividends, of 
30% and 15% respectively, were paid, .$20,000 was written 
off for depreciation, and $1S,000 was expended for directors' 
fees and administration expenses. The company is cap- 
italized for $500,000, of which $400,000 has been issued. 
The company has the exclusive right to select mining prop- 
erty within the limits of the Suan concession until 1916. 
Prospecting is now being- carried on, especially at Tul Mi 
Chung, where silver-lead ore occurs; Sang Dei. where gold- 
copper ore is found: and Paa Whan, where low-grade gold- 
copper ore occurs. This company has so far paid dividends 
amounting to $220,000. The excellent treatment accorded 
employees of the Seoul Mining Co. has culminated in good 
results obtained, loyalty and long service rendered. The 
company looks forward to a prosperous year in 1912. 
A. H. Collbran is general manager at the mines. 

The Chiksan Mining Co., operating a concession in 
North Chung Chyong Do province, is after many vicissitudes, 
getting solidly established, and during 1911 a new organiza- 
tion was effected. Formerly the concession was owned 
jointly by the Korean Exploration Co. and the Shibusawa- 
Asano Mining Partnership. Under the new organization 
the Korean Exploration Co. owns 24% of the capital stock. 
Baron Shibusawa owns 24%, and the Chiksan Mining Co. 
owns 52%. G. R. Gerry of the American Electric Co. of 
Yokohama is president, and G. A. Bagnall, of the same 
company, is vice-president. A. W. Taylor is general man- 
ager in Korea, and the directors are W. D. Townsend of 
Chemulpo, and Messrs. Hillis and Mairabara of Yoko- 
hama. The Chiksan Mining Co. is capitalized for Y2,000,- 
000, the par value of the shares being 750 each. The stock 
is fully subscribed ami the money is in Japanese banks. The 
stock was practically all subscribed locally, that is in Japan 
and Korea. 

The mining concessions of the Chiksan company com- 
prises an area of about 20 square miles. It is the most con- 
veniently situated of all the mining concessions in Korea 
as regards transportation, the headquarters at Yangdei being 
but 9 miles from Seikwan, on the main line of the Korean 
Central railroad. Emm tidewater at Tsunpo to Yangdei i.- 
but 14 miles. The company expects to erect a central elec- 
tric power plant at Tsunpo, using coal as fuel, and trans- 
mitting power to the different [plants. 

There are many strong veins on the concession, besides 
valuable placers. Between Kurangkohl and Sajunkohl there 
is an orebody 8000 ft. long on the strike and 30 ft. wide, 
averaging $5 per ton on the paystreak. Some of the out- 
crops run up to 80 ft. in width, showing assays of from 
$3 to $5 per ton. There are 75 veins on the concession, be- 
sides 1500 acres of placer ground. The placer ground has 
been prospected and its estimated total value is $2,500,000. 
The working costs are estimated at 6e. per yard. 

A 150-ft. two-compartment shaft at Sajunkohl is being 
deepened, and the old Homune mine is being unwatered pre- 
paratory to re-opening. The Homune shaft is down 225 
ft. Among the native Korean miners the Homune mine is 
recognized as the standard of wealth. When asked what 
they think of a good prospect in other localities they will 
reply "as rich as Homune". Some very rich ore has been 
taken out of the old workings by Korean miners. The com- 
pany is rapidly getting its mines in good shape for profitable 
working. In the Yangdei mill dump is over 10.000 tons of 
tailing of an average value of $3.50 per ton. A cyanide 
plan) is now being erected to treat it. 



A good timber supply, sufficient for (i or 7 years, is avail- 
able 8 miles from Yangdei. The company now has 17 
stamps dropping. Up to December 1911, when the new 
10-stamp mill was started, the average bullion production 
was $8000 per month in gold and $2000 per month in con- 
centrate, and the clean-up for the year was $25,000. The 
concentrate is shipped to Tacoma for treatment. No doubt 
this company will later treat its own concentrate. Up to the 
advent of the new 10-stamp mill. S25 tons of ore per month 
was crushed. This mill was built in Japan. The net profits 
last year were 33%%. The mills are distributed as follows: 
Two 5-stamp batteries at Yangdei. also 4 Nissen stamps, and 
a 3-stamp triple discharge Hendy mill at Kurangkohl. I 
have been unable to get estimates of the ore reserves for 1912. 

One strong new company came into the field during 1911, 
the Chosen Mining Co. This company was incorporated to 
take over the interests of the Morris-McGary partnership 
mining concessions in North Pyeng An Province. Yeng Byen 
district. J. H. Morris and E. M. McGary. through the native 
prospectors, obtained the Kosung and Wha San orebodies, 
among the best in Korea. They did about one year's devel- 
opment work prior to the incorporation, proving the value 
of the ore on both concessions. The Chosen Mining Co. 
was then incorporated under the laws of Arizona, for 
$50,000 in shares of $5 each. Two-fifths went to Morris & 
McGary a£ the purchase price of the concession, one-fifth is 
held as reserve, and two-fifths, or 40,000 shares, was sold at 
par value, $5. The capitalization of this company is rather 
low for large operations, but the management has definite 
plans, and will start moderately and increase the reduction 
plant from the operating profits. This should insure large 
dividends, which is the ambition of the management. 

In the Kosung mine, the ore reserves on July 1, 1911, 
were estimated at 150,000 tons of ore of an average value 
of $5 per ton. By the end of the year the ore reserves were 
increased to 300,000 tons. Some of the ore assays very high, 
up to $200 per ton, and shows free gold. Practical labora- 
tory tests prove the ore to be free-milling. With such a start 
and such an ore reserve the Chosen Mining Co. should 
quickly take its place as one of the important mines in 
Korea. J. H. Morris of Seoul is vice-president and general 
manager, E. M. McGary is general superintendent at the 
mines, and W. F. Perkins of San Francisco is president. 

For the past two years the French concession in the Chang 
Song district, one of the largest in Korea, has been worked 
by Koreans under the leasing system. The company has 
derived some revenue from this source, but it leaves the 
mines in bad shape and is not to be commended. Also the 
primitive methods of the Korean mi 11 men are wasteful. I 
have assayed tailing from their mills that contained $90 
per ton. Some intelligent Koreans, who had been trained at 
the Taracol cyanide plant of the Oriental Consolidated, soon 
found that the tailing was readily amenable to leaching with 
cyanide solution, and have been making money ever since. 
There are many strong and well defined veins on the con- 
cession, and some are assaying very high. The concesssion 
is also well forested. M. Saultreaul, of Paris, owns the 
concession and is represented in Korea by E. Martel of 
Seoul. 

Recently the concession has been leased to L. Rondon & 
Co., of Seoul, for a yearly rental of 740,000, the lessees to 
pay all taxes and assume all responsibility for the concession. 
Also, as in the case with the Chiksan Mining Co., 25% of 
the net profits go to the government. The lessees have 
bought the 5-stamp mill of the German concession and will 
install it at Chang Song. I hope the lessees will get 
things going in good shape and make a good profit. Al- 
though some distance from the railroad the French conces- 
sion has many natural advantages, and has a larger visible 
supply of timber than any other concession in Korea except 
the Chosen Mining Company. 

An editorial appearing in the Mining and Scientific 
I'refs of October 29, 1910, refers to the extra-territorial rights 
of foreigners as having naturally disappeared. This is true 
except in one case. The extra-territorial rights of American 
citizens have not disappeared, nor has any notification to that 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



86 



effect been given by the American Consul-General in Seoul. 
As I understand the treaty, one year's previous notification 
must be given. It should be understood, however, that all 
the American citizens now resident in Korea are only too 
anxious to preserve Japanese authority, and in several cases 
recently have voluntarily submitted to the local authority to 
facilitate good relations. Foreigners may obtain mining- 
concessions in Japan proper now, as the Oroyo-Brownhill 
syndicate did last year. And mining promotion is far from 
a standstill in Korea, as the three latest companies to or- 
ganize the Seoul Mining Co., the Chosen Mining Co., and the 
Chiksan Mining Co., have all been financed in Japan and 
Korea. The investing public in the Far East is ready at 
all times to buy good mining stocks, and many more good 
mines will yet be financed here. 

Korea is far ahead of Japan in gold production. Ac- 
cording- to an official report, the total amount of Korean 
gold exported during the first half of the year 1911 was 
Y6,350,140. During the same period gold ore in addition to 
the value of Y119,422 was exported. The total amount of 
gold produced in Korea during half a year is greater by 
over Y300,000 in value than the annual output of Japan. 
The Korean miner is probably the best native miner in the 
world, all considered, and he seems to take to mining nat- 
urally. Prospecting is active and the Mining Bureau receives 
numerous applications from foreigners, Japanese, and Ko- 
reans. There are many virgin goldfields in Korea yet, and 
I think there will be a mining boom here when the facts are 
known. 

Western Mining Districts 

The United States west of the 103rd meridian, compris- 
ing the Rocky Mountain, Plateau, Desert, and Sierra Ne- 
vada regions, is one of the most important producers of 
precious and allied metals in the world. In this area are 
many mining regions or camps, which are known as 'min- 
ing districts.' In most of the states the boundaries of 
these districts are well recognized and some of them are 
legally recorded, and nearly all can be plotted on stale 
maps with a fail- degree of accuracy. In the Mother Lode 
country of California, however, there are no 'mining- dis- 
tricts' in the sense that the term is used in the other states. 

The output of the mines in the United States is reported 
yearly to the division of mineral resources of the U. S. 
Geological Survey, and by a study of the district reports 
for a number of years the values of the most important 
metals produced in each district can be fairly well deter- 
mined. In some districts, notably those in Colorado, the 
values of several products are nearly equal, but in most 
of the districts the output of one metal has a greater 
value than of the rest. 

The U. S. Geological Survey has published reports on 
the economic geology of a large number of the mining 
districts of the country. In 190S the Survey published 
in its annual volume. 'Mineral Resources of the United 
States', a map of the Western states showing the position 
of the mining districts. Bulletin 507, 'Mining Districts 
of the Western United States.' which contains a revised 
edition of the original map, together with much new mate- 
rial, is an index of the gold, silver, copper, lead, zinc, 
quicksilver, iron, and rare-metal mining districts of the 
Western states. 

A geologic introduction to this report, by Waldemar 
Lindgren, not only gives a general summary of the geology 
of the states, but also describes in some detail the eco- 
nomic geology of the more important districts as well as 
some of the less widely known mining regions. This part 
of the report includes a small map of the Western United 
States showing the general distribution of the mining dis- 
tricts. The report contains 14 state maps, which show 
the position and area of over 1400 mining districts. The 
map including the largest number of districts is that of the 
northern counties of California, which contain 222 districts; 
the smallest is the map containing that of trans-Pecos Texas, 
which shows only 11 districts. With every mining district 



symbol on each of these maps is a number which refers 
to its name in an accompanying- list. A bibliography of 
the publications of the U. S. Geological Survey on each 
district is included in the text, as well as a condensed 
statement of the geology and nature of the ore deposits, 
a list of the metals produced, and the shipping point of 
the camp. 

The bulletin contains the latest available information, 
but the Director of the Geological Survey desires that any 
mistakes or omissions be brought to his attention by men 
in the field who are in a position to aid in this work. 



Tuolumne Table Mountain 



By Augustus Locke 

Near Jamestown, California, the important Mother Lode 
veins stand up in a low ridge. On this ridge lie the Harvard 
and App mines. North of the town, the ridge buries itself 
beneath Tuolumne Table mountain. It will be recollected 
that Tuolumne Table mountain is a lava-cap of a Tertiary 
river course, brought out to its present relief by the depres- 
sion of the adjacent land surface. The top of the mountain 




CROSS-SECTION, TUOLUMNE TABLE MOUNTAIN. 

is essentially uneroded, and is remarkably flat. An inter- 
esting condition is the stepping up of the mountain imme- 
diately southwest of the place where it crosses the quartz- 
bearing ridge. The 'rise' is covered by debris; in the vol- 
canic rock, no fault materials are visible. But the large facts 
indicate definitely enough that a displacement of 50 ft. or 
so in the plane of the gouge shown in the accompanying 
section lias taken place since the solidification of the lava, 
and since, therefore, the formation of the quartz. The imme- 
diate cause of this displacement may have been the expansion 
of the foot-wall serpentine. In a general way, the fact that 
the portion of the mountain which is above the serpentine 
is rougher than that above slate suggests that the serpentine 
has been moving. 

Queensland Gold Production 



The yield of gold in Queensland for April shows an 
increase, compared with that for April 1911, of 3720 oz. 
fine in quantity and £15,801 in value. The total output 
for the month was 30,689 oz., valued at £130,358. The 
improvement shown in the return is all the more satis- 
factory, inasmuch as it is spread over several fields. Thus, 
at Croydon there was an increase of 831 oz. ; at Cloncurry, 
.110 oz. ; at Elheridge, 356 oz. ; at Mount Morgan, 2173 oz. ; 
at Ravenswood, 1209 oz. At Charters Towers there was 
a decrease of 330 oz., and at Gympie of 344 oz. The 
yield for the first four months of the present year was 
109,389 oz., of the value of £466,354, a decrease, when 
compared with the corresponding period of last year, of 
3646 oz. in quantity and £15,487 in value. 



Aniak is the name of the district to which the most recent 
Alaska stampede is directed. The discoveries are along- 
Marvel, Fisher, Cripple, and Dome creeks, tributaries of 
the Kuskokwim river. 



86 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



Marble Deposits of the Inyo Mountains 



By Robert T. Hill 

These marbles occur on the southwest side of the White 
Mountain Inyo range, a parallel range to the Sierra Nevada, 
tying to the east of Mount Whitney and separated there- 
from by the Owens River valley, in Inyo county, Cali- 
fornia, directly alongside the Southern Pacific railroad, 
and on the east shore line of the Owens Lake basin. 

The White Mountain range is one of peculiar geographic 
and geologic interest. It may be said to be the last and 
westernmost of the desert ranges of the Nevada type, and 
the first of these ranges east of the great eastern escarp- 
ment of the Sierra Nevada of California. The range 
has a northwest-southeast direction, and is the surviving 
remnant of ancient rocks which were folded in a similar 
direction. The material of the mountains is altered, folded, 
and faulted sedimentary rocks of the older or lower half 
of the geological column, which have undergone regional 
metamorphism into quartettes, slates, ami marbles; accom- 
panied by occasional small dikes of basic rocks, cutting 
across the folded strata, and apparently a large extrusive 
mass of the late Tertiary volcanic rocks, seen just east 
of Lone Pine station, which constitutes the northwestern 
end of the inarbleized block. Proceeding from northwest 
to southeast, (he marbles are seen outcropping from a dis- 
tance of six miles along the southwest, or Owens valley, 
side of the range, from three miles northwest of Inyo 
station to a mile and a half southeast of Swansea. 

Geoloriy. — In the '00s t he area was reconnoitred by Mr. 
Brewer of the California (Whitney) Geological Survey, 
who found a single fossil in the rocks of the White moun- 
tains, from which he reached t lie deduction that they were 
of Jurassic age. This fossil, however, was a eephalapod. 
which in those days prior to the era of rock cutting and 
polishing was a very unsatisfactory criteria for determina- 
tion. In another year the area was visited by G. K. Gilbert, 
who pointed out, in his brief notes, some of the interest- 
ing structural features. In 1894 C. D. Walcott made 
several reports of the White and Inyo Mountain ranges, 
and gave sections showing the existence of a great thick- 
ness of Cambrian and other succeeding Paleozoic rocks, 
and pointed out the facts of their Appalachian structure. 

The rocks of the range are bands of strata which have 
been folded into anticlinal arches, the axes of which are 
parallel to the trend of the range. The limestones of 
this locality were marbleizcd during the Appalachian moun- 
tain period, when they were folded and the beds of marble 
all co-extensive with certain well defined strata now tilted 
at various angles in harmony with the faults. Subsequent 
earth movements have fractured and faulted these layers, 
dislocating them somtimes vertically, sometimes horizon- 
tally. The effect of these later movements is variable. In 
some areas they shattered the ancient marbleized strata 
into minute blocks, in others the small fracturelets thus 
created have been re-cemented and solidified with mineral 
oxides, producing the effects of color which gives to the 
marble in places the peculiar beauty which renders it of 
great artistic and commercial value. Other large areas 
seem unaffected by this cross-faulting. The important 
fact concerning this structure is that the marbleization is 
ancient and general, and took place in the older geologic 
periods mentioned, and is not local or spotted, as is found 
sometimes adjacent to recent fault, lines. The marbleiza- 
tion itself is homogeneous and thorough. 

The Marbles. — The marbles outcrop the entire distance 
previously mentioned, except for a short interval occupied 
by a stream valley just east of Swansea, but are not in 
continuous line on account of east-west faults which have 
thrown them back and forth in horizontal blocks or mas- 
sive hills, as elsewhere mentioned. In places these faults 
or fault-zones result in many cross-fractures, so that the 
material is very much shattered at the surface. In other 
places, however, as at the Inyo quarry and at Swansea. 



the marble is found in blocks or squares of large dimen- 
sions, and there seems no question but that the blocks of 
any workable size desirable may be found in abundance. 
This is especially true about a half mile east of Swansea, 
where the white marble stands in vertical strata and is 
unshattered, and where, owing to the verticality of the 
strata, it can be quarried to a depth with a certainty of 
continuity. 

At Inyo only has commercial quarrying been conducted 
and from this locality much material has been taken in 
times past which has been used in various structures in 
San Francisco, Los Angeles. Stockton, and other places. 
There are several openings in the southwest slope of the 
hill, one of which produces marble of a pure white, and 
two others which yield a variegated product. These quar- 
ries are within a quarter of a mile of one another. Two 
of these quarries are situated from two to three hundred 
feet above the valley plain and are equipped with tram- 
ways and cranes for quarrying, but of a type which can 
be replaced to advantage by more modern facilities. 

The White Marbles. — The white marble quarry lying 
to the northwest apparently has an inexhaustible quantity 
of material, which if properly quarried can be obtained 
in blocks of any desired size. The quality is the purest 
white, tine grained, and, as stated by G. P. Merrill, "equal 
in texture' to Italian marble, but much harder", tinner, and 
more compact." It is certainly handsomer and purer 
white than any American marble with which I am acquaint- 
ed, and this fact alone should render the material of 
great value. These white marbles arc singularly free of » 
what has been termed the 'skim-milk blue' which charac- 
terizes all of the graphite-tainted marbles of the Eastern 
United States. 

The Colored Marbles. — Geologically the variegated mar- 
bles at the quarry a short distance southwest of the white 
marble quarry, are a continuation of the same stratum 
and are of the same substance, which has been variegated 
by the addition of the coloring mineral oxides of mangan- 
ese and iron, which have been introduced through the 
transverse fissures. G. 1'. Merrill may be again quoted: 
"In texture this is of the same quality as the last, but 
the white ground-mass is injected in every direction with 
blotches, streaks, and finely divided branching, feathery 
dark brown, nearly black, dendritic, or fernlike markings 
— ami which, added to occasional blotches of sienna yellow, 
produce an effect that must be seen to be appreciated. 
Still a third variety is sienna yellow of varying shades. 
This last, while nearer the true Italian sienna than any 
now produced, differs in being distinctly granular in text- 
ure, and can be more correctly compared with the well 
known Estromoz or so-called Lisbon yellow, from Alem- 
tojo province, Portugal." 

The Blue Marbles. — There is still another type, which 
produces a radically different but nevertheless desirable 
group of colors. About a mile north of Inyo and also 
north and east of Swansea, there are vast outcrops of 
Btarble of the black variety — apparently representing an 
ancient stratum adjacent to that of the white marble, and 
probably below it in geological sequence. Here may be 
seen a vertical exposure of several hundred feet of thick 
bedded strata, of a dark-blue color, in most places homo- 
geneous and even in texture, but presenting among the 
others one thick bed in which the blue matrix is studded 
with white, oval bodies, suggesting the blue and white 
effects used by the makers of Wedgewood pottery. The 
entire - material is thoroughly calcified and dolomitized into 
massive stones. The whole gamut of blacks is to be found 
here, blue-blacks, the gray blacks, and the pure black mar- 
bles, in unlimited quantities, and can be gotten out in blocks 
of any desired size. 

Extent and Quantity. — The quarries which have been 
opened, as above described, represent only a fractional 
portion of the material, which extends both to the north- 
west and southeast for several miles, and which has been 
undeveloped. The southernmost point examined, some 
three miles south of the Inyo quarries, and about a half- 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



87 



mile southeast of Swansea, shows a magnificent vertical 
stratum of the pure white dolomite marble, estimated to 
be over 100 ft. thick and which has an indefinite depth. 
The white marble beds extend from here to northeast of 
Inyo, some three miles, but they are much shattered by 
cross-faulting at the latter point. Concerning the quan- 
tity of the marbles, there can be no doubt but that it is 
ample for development. 

Determination of Small Amounts of 
Platinum 



By F. P. Dewey 

In the regular course of assaying for the precious met- 
als, gold is parted from silver by dissolving the silver in 
nitric acid. If platinum be present in small amounts only, 
it will readily go into solution in the nitric acid. If now 
a limited amount of hydrogen sulphide be added to the 
solution from parting, any platinum present will be pre- 
cipitated as sulphide, along with some silver sulphide. On 
filtering off the precipitate (which generally is sufficiently 
washed by the operations necessary to transfer it from 
the precipitating-dish to the filter), the moist filter is 
transferred to a small porcelain crucible, dried at a low 
heat, and burned off by gentle ignition. This transforms 
the sulphide precipitate into a metallic sponge, which is 
wrapped in a small piece of thin lead foil and cupelled. 
The resulting bead is then parted in strong sulphuric acid, 
when the platinum will be left as a dark residue, gen- 
erally collected in spongy form, even when minute in 
quantity. This sponge, after reboiling in fresh acid, if 
necessary, is suitably washed by decantation, annealed, and 
weighed. 

Generally, the final metal speaks for itself as being 
platinum, but if there should be any doubt, it may be 
dissolved in a drop or two of aqua regia and gently evap- 
orated. The solution obtained may be tested with potas- 
sium iodide, or a few small crystals of ammonium chloride 
may be added, when the characteristic precipitate will 
show itself. As a further test, this may be filtered off and 
gently ignited to produce spongy platinum. If the amount 
of the final metal be considerable, the platinum may be 
determined by the double-chloride method. Any decided 
difference shown would indicate the presence of other 
members of the platinum group, for which direct test 
could then be made. 

For precipitating the platinum and the necessary silver 
from the parting solution, a very dilute solution of hydro- 
gen sulphide should be used. One part of a strong solu- 
tion should be diluted with from 10 to 20 parts of water. 
If the solution of silver nitrate be strongly acid, it should 
be largely diluted, or it may first be evaporated and then 
diluted. The very dilute hydrogen sulphide solution should 
be added very slowly to the silver nitrate solution with 
constant stirring. The solution is, of course, at once dark- 
ened, but there should be no immediate separation of a 
visible precipitate. The solution should be stirred occa- 
sionally, and in about 2 hr. flocks of precipitate should 
appear. It may be filtered in from 3 to 4 hr., but it is 
a good plan to let it stand over night if possible. 

The amount of hydrogen sulphide required depends, of 
course, upon the amount of platinum present. If this should 
be roughly known or suspected, the amount used should 
generally be enough to precipitate the platinum and from 
three to five times as much silver. On an entirely un- 
known ore, I should at first use 1 c.c. of strong hydrogen 
suplhide solution diluted to 15 c.c, and reserve the filtrate 
from the sulphides for re-treatment if necessary. On 
an unknown bullion, I should use 2 c.c. of strong solution 
diluted to 30 c.c, partly because bullions are liable to 
carry much more platinum than any ordinary ore 4 and 
partly because the volume of the silver nitrate solution 
from parting the gold must necessarily be larger. If, how- 
ever, it is known that minute amounts of platinum are 



present, it is still necessary to use sufficient hydrogen sul- 
phide to give a silver bead large enough to handle com- 
fortably. For this reason, I seldom use less than the equiv- 
alent to 1 c.c. of strong hydrogen sulphide solution. — (From 
the Bulletin, Amer. Inst. Mining Engineers.) 



Estimation of Sodium Peroxide 



By H. L. Easton 

The following method for the estimation of sodium per- 
oxide was devised by J. P. Walker as a modification of the 
method given in Sutton's 'Volumetric Analysis,' and has 
been slightly modified by myself. 

Preparation of Solution. — A N/10 solution of K 2 Mn,0, 
contains 3.16 gm. to 1 litre of water. Standardize such a 
prepared solution with 0.250 gm. of oxalic acid (C 2 H 2 4 . 
2H 2 0). By comparison of equations for the oxidation of 
C 2 H 2 4 and Fe by KJMn 2 O s , it will be seen that the same 
quantity of permanganate is required to oxidize one mole- 
cule (12G) of oxalic acid as is needed to oxidize two atoms 
(112) of Fe. Then, if 0.250 gm. oxalic acid was taken, 
the proportion is: 

126 : 112:: 0.250 :X (0.222) 
That is, 0.250 gm. oxalic acid = 0.222-(- gm. iron. 

Say, for example, it is found by titration that it takes 
40 c.c. of the permanganate solution to oxidize 0.250 gm. 
oxalic acid. Then 0.222 divided by 40 = 0.0055. 

1 c.c. K 2 Mn 2 O s = 0.0055 gm. Fe. 
according to the reaction : 
5Na„0 2 + K 2 Mn 2 9 + SH„S0 4 = 5Na„S0 4 + K 2 S0 4 + 
2MnS0 4 + 50., + 8H,0 
1 part K 2 Mn 2 8 = 5Na 2 2 
(A) or 316 K 2 Mn 2 O s = 390Na 2 O 2 
Also according to reaction : 

10FeSO 4 + 8H.,S0 4 + K.,Mn 2 O s = 5Fe(S0 4 ) 3 4- 
2MnS0 4 + K 2 S0 4 + 8H 2 
(B) 316 K 2 Mn 2 O s = 560 Fe 
Then by (A) and (B) 560 Fe = 390 Na 2 2 . 

It results that 1 c.c permanganate solution equals 0.0055 
Fe. 

Then 560 (Fe) : 390 (Na 2 0„) :: 0.0055 : X 
1 c.c. K 2 Mn 2 8 = 0.00383 gm. Na 2 2 

Process. — On account of the hygroscopic character of 
sodium peroxide it is practically impossible to get an ac- 
curate average sample for analysis. To surmount this 
difficulty, three or four samples are taken from different 
parts of the can or bottle, analyzed separately, and their 
results averaged. This procedure will give a fairly accu- 
rate estimate of the percentage of the sodium peroxide in 
the product. 

After shaking well the can containing the peroxide to be 
analyzed, take out, with a clean dry spatula, 15 or 20 gm. 
and transfer to a clean dry weighing bottle. In taking this 
sample, dip the several portions composing the 15 or 20 gm. 
from different parts of the can, the object being always to 
get as nearly an average sample as possible. Take three 
or four such general samples, using as many weighing 
bottles, and shaking can well after taking each. Do not 
leave the peroxide, either in the can or the bottles, exposed 
to air longer than absolutely necessary. 

From the weighed bottle take out from two to three 
grams of the peroxide on the end of a dry spatula and 
drop it into a flask containing some 400 c.c. of a pre- 
viously cooled solution of 20% H 2 S0 4 . Wash off spatula 
with water jet, close flask, and shake well. While the 
sodium peroxide is dissolving, weigh bottle again to ascer- 
tain exact quantity taken for analysis. Dilute contents of 
flask to a litre and with a pipette draw out 100 c.c, deliver 
into smaller flask, and titiate with the permanganate solu- 
tion until pink color does not disappear by shaking. 

The number of ' cubic centimetres of permanganate used, 
multiplied by the value of the permanganate solution in 



ss 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



terms of sodium peroxide per cubic centimetres multiplied 
by ten, giVes the grams of peroxide in the weighed portion. 
This multiplied by 100 and divided by the accurate weight 
of the peroxide used for analysis {jives the percentage of 
sodium peroxide. Treat each sample taken in like manner 
and average the results. If the available oxygen is re- 
quired, multiply the percentage of sodium peroxide obtained 
above by the factor 0.205. 

South Dakota Metal Production 



The total value of the production of gold, silver, and 
lead in South Dakota for 1911, as reported from 37 pro- 
ductive mines, 17 of which were placers, amounted to 
$7,550,758, according to C. W. Henderson of the U. S. 
Geological Survey. This yield is only slightly below that 
of the record output in 1908, and when compared with 
the value of $5,467,031 in 1910, shows an increase of 
$2,083,727. The gold output was 359,903.90 fine oz., val- 
ued at $7,439,S74, almost 99% of the total value. The 
increase in gold for the year was 98.569.72 fine oz. in quan- 
tity and $2,037,617 in value. The yield of silver also in- 
creased from 118,800 to 203.755 fine oz. Smelting ore 
from South Dakota in 1911 carried 64,311 lb. of lead, 
against 14,136 lb. in 1910. Placer gold increased from 
143.77 fine oz. in 1910 to 5S4.03 fine oz. in 1911. 

A total of 1,946,127. short tons of ore was mined and 



treated in 1911, compared with 1,523,929 tons in 1910. 
Of this total. 1,940,661 tons was treated in the mills of 
the state, yielding as bullion $7,317,942 in gold and 172,598 
fine oz. of silver, valued at $91,477, with an average recov- 
ery per ton of $3.77 in gold and 5c. in silver. Smelting 
ore, 5466 tons, averaged 0.959 oz. of gold per ton and 5.69 
oz. silver. 

The yoKi mines of the Black Hills, chiefly in Lawrence 
county, were steadily operated in 1911, and in addition 
there were a few productive mines not operated in 1910. 
The Homestake mine, which produces most of the gold 
bullion from this state, at the beginning of the year had 
completely overcome the labor difficulties of 1909-10 and 
was again operating at the full capacity of its plant of 
1000 stamps. Developments of note in the northern Black 
Hills were the advancement toward completion of the Home- 
stake hydro-electric plant; the building at Galena of a 
new smelter and the Gilt Kdge-Maid concentrating plant; 
the proposed construction of a roaster at the Golden Re- 
ward mine to handle the newly developed sulphide ores; 
the open-cut mining and continuous operation of the Wasp 
No. 2. Co.; and the building of the 300-ton cyanide plant 
of the Bismarck company. In the southern Black Hills 
the first dredge to be built in the state was operated for 
5Vk months at Mystic, Pennington county. The dredge is 
owned by the Castle Creek Hydraulic G. M. Co., and has 
close-connected buckets of 5-cu. ft. capacity. 





1910 


1911 


Increase. 




Quantity. 


Value. 


Quantity. 


Value. 


Quantity. 


Value. 


fine ounces. . 

• do 

pounds.. 


261,334.18 
118, S00 
14, 130 


S3, 402, 2 57 
■ 64, 152 
G22 


359, 903. SO 
203,755 
64,311 


87, 439,874 
107,990 
2.S94 


98, 569. 72 
84,955 
50,175 


$2,037,617 

43,838 
2,272 


Total 




5,467,031 




7,550, 75S 




2,083,727 











South dakota metal proouctiox, 1911. 



Copper Output, 1912 

Statements of the copper production of the principal 



companies for the first six months of 1912 and the follow- 
ing estimate of earnings have been made by Hayden. Stone 
& Co. Except for the new companies, the production in 
li)12 does not greatly exceed thai of last year. 







Approximate 






Net estimated, 


Net per 




Production, 


production, 


Net earnings, 


Net per 


6 months, 


share. 1912 




1911. 


6 months, 1912. 


1911. 


share, 1911. 


1912. 


(15c. cop.) 




15,196,127 


7.818,165 


$ 870,273 


17.40 


$ 603,500 


12.06 




, , , 4,780,494 


2,570.410 


6,379 





75.000 


0.75 




259,407,093 


140,000,000 


8.316,063 


1.90 


7,700,000 


1.78 


Calumet & Arizona... 


. . . 49,945,905 


26,556,000 


2.525.322 


4.24 


1,987,500 


3.31 


Calumet & Hecla 


74,130,977 


36,493,946 


3.077,000 


30.00 


2.372.500 


23.72 




1,493,834 


853,855 


6,045 




27,000 


0.30 




. . . 29,310,579 


16,027.200 


804,561 


2.01 


920,000 


2.30 




17,858,860 


10,978,487 


217,416 


1.45 


4411. 


2.93 




45,440,000 


24.050,000 


1,184,750 


0.4S 


1.380,000 


0.57 




7,490,120 


3.986,315 


156.708 


1.00 


180,000 


1.20 




15,385,783 


14.794,396 


489.603 


0.65 


962,000 


1.33 




12,091,056 


6,894,994 


300,786 


3.00 


345,000 


3.45 


Nevada Consolidated . . 


... 78,541,270 


36,757,107 


4,336,216 


2.16 


2,880.000 


1.44 


North Butte 


24,816,669 


13,000.000 


641.858 


1.56 


650,000 


1.62 


Old Dominion 


19,195,181 


12,843,000 


621,964 


2.13 


704,000 


2.34 






S.3S1.840 


664.628 


6.65 


378,000 


3.78 




134,149,627 


66,581,233 


4,278,481 


9.50 


4.329,000 


9.62 




22.252,943 


11,300,000 


507,597 


4.60 


508,500 


4.62 




14,935,047 


14,000,000 


298,640 


0.25 


840,000 


0.58 




15,168,10S 


8,696,000 


118,854 


0.39 


320.000 


1.06 




3,236,233 


2,243,340 


64,516 





22,433 


0.22 




7,494,077 


4,058,200 


196,934 





80,000 


1.33 




13,808,940 


7,000,000 


407,049 


2.03 


315,000 


1.57 


Utah Consolidated .... 


. . . 9,162,023 


5,000,000 


•438.430 


1.44 


400,000 


1.33 




93,514,419 


54,000,000 


6,237.928 


3.96 


3,915,000 


2.48 




9,617,168 


4,500,000 


487,895 


8.09 


247,500 


4.10 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



89 



Discussion 

Readers of the Mining and Scientific Press are invited to 
use this department for the discussion of technical and other 
matters pertaining to mining and metallurgy. The Editor 
welcomes the expression of views contrary to his own, be- 
lieving that careful criticism is more valuable than casual 
compliment. Insertion of any contribution is determined by 
its probable interest to the readers of this journal. 



A Mountain of Gold 

The Editor: 

Sir — Referring to my article under this title published 
in your issue of December 2, 1911, I have now obtained 
a photographic print of the biggest mass of silver ever 
mined. This I owe to the courtesy of D. W. Brunton. 
This mass of silver came from the Smuggler mine, at 
Aspen, weighed .1840 lb., and was of a purity equal 
to sterling silver. Such impurities as were present con- 
sisted of rock. It came from a small lenticular body of 




MASS OF SILVER, SMUGGLER MINE. 



native and sulphide silver ore, ranging in thickness from 
2 inches to 2 feet, that yielded in all nearly 10 tons, sold 
for a trifle over $90,000. It was part of the same deposit 
of high-grade sulphide and native silver ore that was found 
in the Mollie Gibson, although the two orebodies were 
widely separated by a fault. 

T. A. Rickard. 

London, June 20. 



The British Language 

The Editor: 

Sir — In your editorial on the British language in the 
issue of March 9, 1912, the sentence in parentheses, "(The 
Horse-Shoe and Ivanhoe lodes are frequently disturbed by 
slides)", is mine. "Lode disturbed by slide" is from the 
mine cable to London. I just wished to point out this 
feature of these two mines. Yet, I quite agree with your 
comment on the word 'slide', and will use the correct word, 
'fault', in future. 

In mixing with miners and millmen some peculiar 
phrases are heard. In West Australian mills, especially 
the roasting plants, a great quantity of sulphates are pre- 
cipitated from the circulating waters in pipes, pans, agi- 
tators, and the like. This forms a hard slaty scale, which 
is easily removed. The men invariably call this corrosion. 
Why, I do not know; and I have often explained to them 
that when corrosion goes on, something is being eaten or 
worn away. Scale is as handy a term for this material as 
can be found. Tautology is heard all day long, whether 



at work or in town. The term 'running' is commonly 
used in a mill. The engine, crusher, battery, pan, tube- 
mill, or pump is 'running.' Why not working? Also, the 
solution 'runs' down the launder, or the pulp then 'runs' 
to the agitator. Why not flows? Men and animals run, 
not liquids. 

"When do you reckon to get going?" is often heard in 
reference to starting a new plant, or any particular ma- 
chine which may be under repair. 

I am glad to say that few of the men I meet use the 
plural on slime, sand, concentrate, or middling. A col- 
lective noun of this type requires no 's' to indicate the 
plural ; besides, it sounds better without. The drive-ropes on 
an engine are often spoken of as 'cables.' Ropes is the cor- 
rect term. One speaks of ship's cables, and sometimes 
cables for transmitting electric power. In one dry-crushing 
plant in which I worked, everybody, from mill manager 
down, spoke of the dry-crushed ore as 'pulp.' "The pulp- 
bins are nearly full.' Why not fine-ore bins? I never used 
the term, but could not break anybody of the habit; in 
fact at first my use of 'fine ore' was not understood. A 
mixture of water or solution with crushed or ground ore, 
I call pulp. Nothing else. 

'Re-precipitation' has always been a mystery to me. 
Why the 're'? This means again. Nothing has been pre- 
cipitated again. If a solution has dissolved the gold from 
the slime in an agitator, or other machine, and through 
some cause there is a loss of gold, this has not been re- 
precipitated, but simply prematurely precipitated, before 
it reached the precipitating-boxes. These are a few local 
failings not mentioned in that useful little book, 'A Guide 
to Technical Writing.' 

Kalgoorlie Correspondent. 

Kalgoorlie, May 6. 



Free Use of Timber From Public Lands 

The Editor: 

Sir — In 1 he issue of June 22, Ernest V. Orford criticizes 
as erroneous a 'Concentrate' item on use of public-land 
timber which was taken from my book on mining law. 
The public-land laws regarding the use of timber are as 
much of a 'hodge-podge' as some of our other public-land 
laws have become since the radical conservationists of the 
East and the sane ( ? ) conservationists of the West began 
pulling in opposite directions. My statement was prepared 
from some experience and from close association with those 
engaged in overseeing the use of public-land timber, both 
in the field and at Washington. Therefore, I consider it 
very accurate, notwithstanding that it varies somewhat 
from the interpretation of Mr. Woodbury. A new set of 
timber regulations relating to Alaska was drafted last 
winter. These will not really alter the old conditions, only 
reduce to some extent the amount of timber allowed. This 
is strictly 'progressive' and in line with the idea that the 
natural resources are much more valuable in 'poor Alaska' 
— as some of us have come to term it — than in the United 
States proper. 

H. W. MacFarren. 

Williston, North Dakota, June 29. 



Alaska miners have had much to contend with in their 
efforts to discover ore, but the first comers have developed 
great ingenuity in monopolizing a creek, once a discovery is 
made. There being no limit to the number of claims that can 
be staked, and power of attorney being recognized, only the 
amount of wood available and the length of the telephone 
directory at hand has determined the territory covered by 
'association claims.' At Aniak they have gone even further. 
The men first on the ground covered the creeks with claims. 
These they promptly leased to themselves. The newcomer, 
therefore, who wants a 'lay' must content himself with a 
sub-lease. Such a system must operate to limit develop- 
ment except where the discovery is so obviously rich as to 
lead men to take even unfair chances in the effort to develop 
a mine. 



90 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



Special Correspondence 



NEW YORK 

News from the Copper Mines. — A Large Commission. — 
Tonopah. — Market Rumors. 

The directors of the Tennessee Copper Co. have de- 
clared a dividend of $1 per share. The last dividend was 
paid in February and was at the rate of $1..j0 per share. 
The directors failed to state the period which the present 
disbursement covers, and the annual rate is consequently 
left in doubt. The stockholders of the Ohio Copper Co. 
have voted in favor of the reorganization plan under which 
the holders of the old stock are permitted to exchange 
their present holdings on the basis of share for share of 
new sleek upon the payment of $1 for each share of "hi 
stock held. The new stock is issued as having $3 paid 
on a par value of $5. This will give the company a call 
of $2 per share upon the stock, and amounts to an ability 
to assess without going through a reorganization. The 
$2.0(1(1.00(1 mortgage given to secure the bond of the La 
France Copper Co., covering the Lexington mine, the Masin 
reduction plant, and several mining claims at Butte, is 
being foreclosed by the Lincoln Trust Co. The suit for 
a receiver to take charge of the Stewart Mining Co. is 
soon to be heard in Boston. Besides asking for a receiver, 
the plaintiffs are demanding that a large amount of treas- 
ury stock be returned to the company as having been 
wrongly issued to F. A. Heinze and his associates, and 
also demand an accounting from each of the defendants. 

There is a well defined rumor that the Utah Consolidated 
is to cease operations. Should it do so, it is probable that 
the plant of the International Smelting & Refining Co. at 
Tooele, Utah, will become exclusively a customs smelting 
plant. There is hardly a property in the country that has 
gone through all stages of mining activity any more com- 
pletely than Utah Con. Originally opened as a gold mine 
— and a very real one — it later developed into what was 
then the world's lowest-cost copper yroducer. The recent 
addition of lead stacks to the plant at Tooele was made 
for the purpose of taking care of the lead ores that were 
being developed in Utah. The shares of the First National 
Copper Co., which controls the old Balaklala, and which 
was at one time one of Lawsoivs market features, have 
been exceedingly weak in the New York market on the 
strength of a report that a large part of its fuel and mine 
supplies has been sold to the Mammoth Copper Co. N. L. 
Amster, of Boston, has started shipments from his R. R. H. 
property near Patagonia, Arizona, to the Copper Queen 
smeller, and is sending out one carload per day of 10% ore. 

L. I). Ricketts, of the Greene-Cananea, and W. D. Thorn- 
ton, also a part of the Cole-Ryan forces, are both at the 
Inspiration property on a tour of inspection. Inspiration 
is looked upon as a possible factor in some coming con- 
solidations, and it is believed that the controlling interests 
are not endeavoring to bring it to the point of production 
in record time until some additional properties shall have 
been secured. 

Recently the workmen employed by Henry C. Frick 
began tearing down the old Lenox Library in Fifth ave- 
nue. New York, which was erected in 1865, The copper 
roof was found to be as good as when it was placed on 
the building. When the roof was, purchased, copper was 
selling as high as 50c. per pound, and the cost of the cop- 
per sheets was considerably in excess of that figure. 

The amount of interest that prevails in the Cobalt issues 
is evidenced by an inquiry made by one broker of another 
for a market in Nipissing; the quotation was given $7.62 
to $7.87, 100 shares sold during the entire week. The 
company i* in a strong financial position and has over 
$1,000,000 of eash reserve. Nipissing is now doing some 
of its exploratory work with a hydraulic giant. David 
Fasken, one of the leading members of the legal profes- 
sion in Canada, has brought suit against the McMartin- 
Timmins-Dunlap syndicate for a commission of $640,000 



which he claims he earned in the sale of the La Rose to 
E. P. Earle, William B. Thompson (of Thompson, Towle 
& Co., of New York), and their associates. The conten- 
tion of the defendants is that Mr. Fasken's services were 
only those of an attorney and that he was not acting as 
selling agent for the property. 

Tonopah issues have been a feature of the New York 
mining market. The tire which destroyed a part of the 
business section of the camp gave the bears an opportunity 
for a little action, but when it was learned that no mining 
property was destroyed the market quickly regained all 
lost ground. Traders in Butte & Superior were somewhat 
stampeded at a story that litigation on the company had 
been started by W. A. Clark, who owns the adjoining Elm 
Orlu property. Mr. Clark was one of the original own- 
ers of Butte & Superior, and it is not believed that any 
question will arise that cannot be settled without resort 
to the courts. I). ('. Jackling is now making an inspec- 
tion of the Butte & Superior and is to go from Butte to 
Alaska in behalf of the Guggenheim interests there. The 
Isle Royale and the Lake Copper Co. interests, headed by 
Reginald C. Pryor of Houghton. Michigan, have organized 
the Onondaga Copper Co., holding some 10.000 acres of 
ground adjoining the White Pine property. 

BOSTON 

Bradley Process at Bvtte. — Utah Copper Puzzling. — 
Bidding for the Bluestone. 

Boston is waiting and "watching for the real news from 
the Copper Extraction Co.'s experiments at Anaconda on 
the slime of the Anaconda company. The Copper Extrac- 
ton Co. is the name of the company operating the Bradley 
process, which is owned by the inventor, Mr. Bradley, 
and A. ('. Barrage and Thomas W. Lawson, of this city. 
.Mr. Burrage financed the building of the experimental plant 
at Anaconda, and has a representative at Anaconda watch- 
ing the experiments. The plant has been shut down from 
time to time to make repairs and readjustments, so it 
has been hard and slow work finding out what is going 
on. It will be remembered that the Bradley process is 
the one which Lawson brought out with a great flourish 
of trumpets three or four years auo to begin treatment at 
the Santa Rita (now the Cirino) mine. He afterward stated 
that the Heinze interests in Ohio Copper were securing from 
him the rights to use the process in treating its low-grade 
ore. He exploited the new process extensively in news- 
paper stories and then it dropped out of sight until it 
came to light again in connection with the experiments 
with the Anaconda slime. The plant which Mr.' Burrage 
has built at Anaconda has a capacity of 2.">0 tons per day. 
The Anaconda company has over 1,000,000 tons of slime 
piled op at the Washoe smelter carrying about 2Vi% cop- 
per and about $1 per ton in gold and silver. This is prom- 
ising material for copper extraction when it is recalled 
that it is about the average of the recovery of the large 
mines in Nevada, Utah, Arizona, and New Mexico. 

There are two opinions in Boston regarding Utah Con- 
solidated. The News Bureau faction is bearish upon the 
issue, while G. L. Walker of the Boston Commercial claims 
to have "information from authentic sources that Utah Con- 
solidated will have a very profitable year." Mr. Walker 
may be considered somewhat in the line of a specialist 
on Utah Consolidated, since he led the insurgent fight, two 
years ago, to take the management away from Urban H. 
Broughton. The News Bureau printed a story that under- 
ground developments at the Utah Consolidated continue 
to be disappointing and that there were rumors in the 
West of the mine being shut down. The Boston Commer- 
cial telegraphed R. H. Channing, Jr., at Salt Lake City, 
and received a denial of the story, which is published. 
Utah Consolidated has been, in the language of the Street, 
a 'bad actor,' and market interests here are prepared to 
hear and believe the worst about it. It has been going 
from bad to worse so long that traders associate the name 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



91 



of this one-time show property of Bingham with slow but 
sure disaster. 

"Bluestone, Bluestone! Who's got the Bluestone?" A 
variation of the old nursery game is going on in the bid- 
ding for J. R. De Lamar's copper mine, the Bluestone, 
at Yerington, Nevada. It has been published in the East 
more than once that this property is to be taken over by 
the Mason Valley. It is said that the Gunn-Thompson in- 
terests have agreed to pay Mr. De Lamar $1,500,000 for 
the property. I met the representative of one of the large 
interests of the Yerington district here a few days ago, 
and he told me in confidence a story quite to the contrary. 
He says the ownership of the Bluestone is to pass in 
that district, but not to the Mason Valley. The Blue- 
stone, while inactive, has been one of the notable copper 
prospects in the West for the past six years. The blue- 
stone from this mine was shipped 60 years ago to the 
Comstock, 35 miles away, to be used in milling the silver 
ores there. Mr. De Lamar lias spent approximately 
$350,000 in developing the Bluestone mine. It has been 
opened to a depth of 540 ft., and drilling operations have 
been conducted to a depth of 750 ft., proving that the ores go 
that deep. The Bluestone claims developed ore amounting l«> 
1,600,000 tons, averaging 2.6% copper. Magnetic separa- 
tion tests have demonstrated that a saving of over 98% 
of the copper can be obtained, yielding a self-fluxing pro- 
duce which averages over 15^% copper. The Bluestone 
is an interesting mine, and Boston would like to see it 
acquired and amalgamated by one or the other of the dom- 
inant interests in Yerington, so that it would no longer be 
inactive. I believe there will he a spirited contest to secure 
control of this property, and it is by no means settled 
that the Mason Valley interests will get it. 

LONDON 

Poderosa Mine Unprofitable. — Unfavorable Working 
Conditions. — Mineral Output of Federated Malay 
States. 

The Poderosa copper mine has been one of the unsuc- 
cessful English speculations in South America. A com- 
pany was formed in 1908 to acquire the mines from local 
owners, situated in the Opllahuasi district of Chile, not 
far from the Bolivian border. The management of the 
properties was placed in the hands of Robert Hawxhurst, 
of San Francisco, who was subsequently succeeded by ('. 
H. MaeNutt. Results have been disappointing, owing to 
the many difficulties of working and to the unsatisfactory 
nature of the'orebodies. The altitude, 15,000 ft., the cli- 
mate, the cost of transport, and scarcity of supplies, all 
have combined to hinder energetic operations. The flood- 
ing of the mine in March 1911 seriously interfered with 
work, and the provision of additional pumps was a tedi- 
ous affair. In addition, the last wet season and the winter 
were both unusually severe and long, and their effects on 
the health of the men and on the condition of the mine 
were disastrous. Not only did the production fall, but 
the cost was increased. The amount of ore exposed re- 
cently has been disappointing, and a large proportion of 
the output during 1911 came from the auxiliary veins which 
at best are narrow and irregular. During the year 18,357 
long tons of ore was raised, of which 15,577 tons came 
from the Poderosa and the remainder from the San Carlos 
and Rosano mines. The average assay was 17.3% copper. 
In addition, 27,776 tons averaging 3% copper was raised 
and placed on the dump for future concentration. The 
shipments were 13,392 tons averaging 22% copper and 7% 
oz. silver; this was sent by rail to the port of Mejillones, 
whence it was forwarded partly to America and partly to 
Europe. The ore reserve on December 31 was calculated 
by Mr. MaeNutt at 21,000 tons averaging 22% copper, 
mostly at the Poderosa and San Carlos. In addition, there 
is 110,000 tons on the dump averaging 4V2% copper. The 
net proceeds from the sale of ore was £112,707. The 
mining expense was £105,947, and £19,649 was allowed 



for depreciation. The loss for the year was £16,995, which 
brings the debit balance to £47,033. The financial outlook 
is therefore decidedly discouraging. 

The output of the Federated Malay States mines in 1911 
is summarized in the report of the Warden of Mines, re- 
cently made public. The total tin output of the year, 
44,149 tons, was reported earlier, and the additional state- 
ments furnished by the Warden are somewhat lacking in 
detail, as is but natural, since the tin industry is so largely 
in the hands of the Chinese, who are not anxious to fur- 
nish accurate figures. Of the 196,500 men employed in 
mining, 189,000 are Chinese, 4600 Indians, and 2500 Malays. 
The year's output in piculs 1 of some of the larger com- 
panies is as follows : Tronoh, 64,780 ; Pahang Con., 18,181 ; 
Serendah, 9070; Kampar, 8645; Tambun, 8092; Lahat, 
7403; Kalumpang, 5447; Batang Kali, 495!); ( 'henderiang, 
4306; Roman Tin (vein), 406!); Menglembu Lode Syndi- 
cate (vein), 3833; Societe des Elains de Kruta, 2344; Sun 
Wen, 2705. The North Tambun and Khan Kellas com- 
panies have installed Australian dredges, but did not start 
in 1911. Several French and German companies are in 
process of development. The production of tungsten was 
2S16 piculs, valued at £84,500 (local currency). The gold 
output was 9228 ounces, a large decrease, owing to the 
decreased output at Raub, only 8581 ounces. 



PIOCHE, NEVADA 

Railway Open. — Shipments Resumed. 

The railroad spur, 8V2 miles long, recently built by the 
Prince Consolidated Mining Co. from Pioche station to 
the Prince mine, was opened on June 30. A special excur- 
sion came from Salt Lake City to take part in the cere- 




PRINCE CON. SHAFT, PIOCHE. 



mony of driving the golden spike, with appropriate speech- 
making. In this excursion were represented a majority of 
the business interests of Salt Lake City, especially the 
banks, smelters, attorneys, brokers, and many commercial 
houses. On the train that went out to Caliente, carrying- 
the excursionists Monday afternoon, were 23 cars of ore 
furnished by the Prince Consolidated, 12 cars from the 
Prince and 11 from the tailing dump at Bullionville. 

The control and management of the Prince Consolidated 
still remains with the Godbe brothers, but an option on the 
control of the stock has been given to a syndicate includ- 
ing Charles E. Knox of Tonopah, John Kirby of Salt Lake 
City, George Wingfield of Reno, and others. A payment 
of $20,000 has been made on this option, which will un- 
doubtedly soon be exercised and the management pass to 
the new owners. Nearly forty years ago W. S. Godbe came 
to Pioche, saw what the camp had done, and determined 
to have his part in the riches which he foresaw must 

^he picul = 133 pounds. 



92 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



still be here. He first purchased the tailing dump at Bul- 
lionville, and began the campaign which has now reached 
fruition. At present about 300 tons per day is being 
shipped from the Prince, and an average of perhaps 400 
tons from the tailing beds at Bullionville. It is the expec- 
tation of the management to continue shipments from the 
tailing beds for a year, and to increase the Prince ship- 
ments soon to 500 tons per day. The Nevada Utah Mines 
& Smelters Corporation is beginning to straighten out its 
tangles. A number of the most embarrassing obligations 
have already been settled in cash. From these indications 
it is generally believed that Allen II. Rogers, engineer for 
the Nevada Utah, who recently made careful examination of 
the properties here, reported favorably. 



KALGOORLIE, WESTERN AUSTRALIA 

Labor Unrest. — Poor Results at the Laxcefield. — April 
Gold Production. 

There is a spirit of unrest among the mine and other 
employees in this state, as in every country in the world. 
No sooner was the engineers' dispute settled than the mold- 
ers went out, though they returned under old conditions after 
losing eight weeks' pay at £5 to £5 Id. per week, besides 
overtime. The union called out the only three molders 
employed on the Lancetield mines, with the result that 
Bewick, Moreing & Co., who were praying for an excuse 
to close down the mine, promptly did so, and threw 450 
men permanently out of work. The shovelers and tram- 
mers on the recently started Yuanmi struck for an ad- 
vance from lis. to lis. Sd. per shift. As only IS men 
were affected, the extra <Sd. was granted and the men 
signed a three-years agreement on that basis. All the 
industrial agreements at the Kalgurli expire on September 
30 on a month's notice on either side. The men are al- 
ready holding informal meetings, and the trammers and 
shovelers will claim higher wages. The former have the 
worst job in t he mine, as they are t he first to return after 
tiring, run the greatest risk of miner's complaint from 
smoke, fumes, and dust, and also are most commonly ex- 
posed to falls of ground. Even if a raise in pay is granted, 
it is more than probable that nine-tenths of these laborers 
will desert the mines for work on the transcontinental rail- 
way which may start any day. Their places will be filled 
by Austrians and Italians, who have been immigrating in 
large numbers, expecting to work on the railway. The 
present Labor Government intends giving preference to 
union men, even for clerical work, and this will debar for- 
eigners, who rarely join local unions. The railway will 
require two or three years to build, and employ hundreds 
of men, and as many of these will be prospectors, new 
gold and mineral fields may be found in hitherto inac- 
cessible country. 

The Lancetield, after producing £830,000 from 540,000 
tons at a loss, has closed down, and it is hard to say 
when it will be reopened. The vein varies from 25 to 
28 ft. in width, and the ore yields over 30s. per ton, but 
costs have been about one-sixth more; treatment alone 
costing l~s. (id. per ton. The mine was originally equipped 
with a 40-stamp mill, but when the sulphide zone was 
reached the ore was so impregnated with arsenopyrite that 
extraction without roasting was found impossible. New 
capital was raised to the extent of £60,000 and a roasting 
plant constructed, but the design, although a copy of that 
on the South Kalgurli, was so faulty and the construction 
so poor that the roofs of the furnaces collapsed almost 
at once, and work had to be stopped. More capital was 
raised and the plant remodeled, but a faulty plant can 
never be remedied, and an entirely new plant will prob- 
ably have to be provided at a cost of another £50,000 or 
£60,000. The vein at 1000 ft. is over 20 ft. wide and as- 
says over 40s., so that there are great possibilities in the 
mine, if an economical plant is installed. 

The Mountain Queen at Southern Cross, one of 
Bewick, Moreing & Co.'s mines, started crushing with a 



2-head Holman pneumatic stamp in January, and the out- 
put gradually increased until in April 3735 tons was treated, 
yielding £3440 at a profit of £1129. The ore is soft and 
oxidized, and the tailing consists almost entirely of slime 
carrying nearly as much gold as has been saved. A Cas- 
sel's vacuum slime-plant has been ordered, and should 
more than double the profit. The ore developed above 200 
ft. is estimated at 58,500 tons, worth 34s. 6d. by assay. 
The Queen of the Hills, another Bewick. Moreing & Co. 
new venture, is developing well. Above the 100-ft. level 
70.S00 tons assaying 53s. lid. has been developed, and 
sinking is in progress. This mine will also be equipped 
with a Holman pneumatic drill and a suction gas-engine, 
similar to the Mountain Queen, but there seems to be some 
difficulty in raising the money at the moment. Bewick, 
Moreing & Co.'s operations at Porcupine have not been 
a success, nor their oil ventures at Maikop, in Russia, and 
at present they are opening an old mine in California, all 
of which requires capital. 

During April the gold mines of Western Australia pro- 
duced 107.392 ounces fine, and paid £108,219 in dividends. 
The chief producers were: 

Name. Tonnage. Value. Profits. Dividends. 

Great Boulder 17.702 £4(5.972 £25,807 

Ivanhoe 20.330 38,895 16,035 £70.000 

Kalgurli 10,310 21,296 9.075 

(iwalia 12,020 19.016 3,056 24.000 

Lake View & Star. . . 17,704 21,080 3,580 10.000 

Oroya Links 11,010 13,395 3.373 

Black Range 2.227 7.520 3,061 2.719 

South Kalgurli 9.351 11.975 2,683 

Oroya Black Range. 4.700 8.497 2.644 

Burbanks Main Lode. 1.700 4,500 2,330 

Marama 2,636 5.375 2.175 

Yuanmi 4,280 8,741 4,089 

Golden Horse-Shoe.. 24.269 33.948 1,905 

Golden Ridge 2,936 5,269 1.751 

Perseverance 20,758 21,242 1,410 

Sand Queen 924 2.S85 1.24!) 1,500 

Ida H 1,100 4.187 1.460 

Associated 10.530 14,096 1,723 

Lake View Consols. . 8,820 7.722 600 

Mountain Queen . . . 3.735 3,446 1,129 

Boulder No. 1 2,392 2,650 691 

Hainault 5,622 6.487 504 

Great Fingall 5,557 10,192 1 

Associated Northern. 1,282 4,117 



BRITISH COLUMBIA 

Report of the Minister of Mines. — Progress in Slocan 
District. — Mining at Ainsworth. 

The annual report of the Minister of Mines for British 
Columbia for the calendar year 1911 was issued by the 
Provincial Department of Mines on July 3. The prelim- 
inary review and estimate issued by the department early 
in the current year showed $23,211,818 as the estimated 
value of the 1911 mineral production. The revised re- 
turns included in the Annual Report give the value as 
$23,499,072. so that the estimate of the provincial miner- 
alogist, published shortly after the close of the year, was 
only $287,256 short of the actual total value for the year. 
The report contains much of interest apart from the statis- 
tical information. Several of the gold commissioners of 
the province give particulars of mineral claims and mining 
operations in their respective dstricts, and the provincial 
mineralogist contributes reports and compilations of data 
on various districts and some important mines, notably a 
number in Slocan district, the Britannia mine, the Skeena 
district (both mineral claims and coal areas), and others. 
His notes on French's process for the separation of zinc 
and lead, and on investigations made in connection with 
the reported discovery of metals of the platinum group 
in dikes in the vicinity of Nelson, are of .particular value, 
since they will serve as a warning to the public to be 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



93 



careful before spending- money on them until the reliability 
of statements made in connection with these matters shall 
have been thoroughly tested. The report gives particulars 
of the French zinc process, and some results of investiga- 
tions made, but adds that the department "has made no 
attempt to test the commercial value of the process, but 
has made some investigation as to the principles involved." 
The results of these investigations, it may be added, do 
not indicate complete success of the process. ' As to the 
platinum, samples of the dike and concentrate were sup- 
plied by the mining company chiefly interested and vouched 
for "as being from the dike, arrd from that part of the 
dike reported to have given results in platinum metals." 
Identical samples sent by the department to eminent chem- 
ists in London and New York, as well as to the laboratories 
of the Geological Survey of Canada and the provincial 
department of mines, were reported on, without exception, 
as not containing any of the platinum metals. The con- 
cluding' paragraph in the official account of this investi- 
gation runs thus : "As will be seen by the evidence just 
given in detail, this bureau has tried impartially to ascer- 
tain whether there is any foundation of fact in the alleged 
discovery of the platinum metals in these dikes, but the 
conclusion which must be ar- 
rived at is that they do not 
exist in the material tested. 
Should it be claimed that 
these metals do exist in other 
dikes in the vicinity, that fact 
will have to be thoroughly 
established before it can be 
accepted." 

Mining in the Slocan dis- 
trict of West Kootenai ap- 
pears to be on a better basis 
now than at any time for a 
number of years past. In the 
vicinity of Slocan lake, at 
what is known as Fourmile or 
Silverton, there is much ac- 
tivity in three mines, namely, 
those of the Standard Silver- 
Lead Mining Co., Van-Roi 
Mining Co., and Silverton 

Mines, Ltd. During six months to July 1 the Standard has 
shipped to the smelter at Trail about 4800 tons of sorted ore 
and silver-lead concentrate. Its mine and concentrating 
mill are being regularly operated. Results are profitable, 
for in April a dividend of lV^c. per share was paid on the 
company's 2,000,000 $1 shares, while in May, June, and 
July dividends, each of 2 1 /2<'- per share, have been paid. 
The total amount distributed in the four months is $175,000. 
It has been announced that it is expected the company 
will be able to pay a monthly dividend totaling $50,000 
for some time to come. The Van-Roi mine appeal's on 
the published list as having shipped 1500 tons of silver- 
lead concentrate during the first six months of this year. 
This company also makes a silver-zinc concentrate, but no 
information has been obtained as to its quantity. Recent 
reports are to the effect that another orebody has lately 
been found in the mine. The Silverton Mines, Ltd., has 
had the misfortune to be deprived of the use of the Wake- 
field mill, which has been destroyed by fire. The company 
leased this mill, and it had been engaged in experimental 
milling for some time, to determine how best to recover 
the high silver content of its Hewitt-Lorna Doone mine 
ores, some of which are rich in ruby silver. 

The most satisfactory development in the Slocan district 
of late has been the finding of high-grade ore on the 1400- 
ft. level of the Rambler-Cariboo mine, in McGuigan basin. 
Large shoots of ore of excellent grade has been opened 
on various levels down to the 1200-ft., but similar ore had 
not heretofore been found on the lowest (1400-ft.) level. 
Construction of an aerial tramway from the mine down to 
the new millsite alongside the railway, and equipment of 
the concentrating mill, are in progress. The branch rail- 



way is Hearing completion also, and it is expected thac 
in the ensuing autumn shipment of sorted crude ore and 
silver-lead concentrate will be considerable. 

More information concerning mining in Ainsworth divi- 
sion will be given later. Just now the position must be 
briefly summarized. At Retallack & Co.'s mine (the old 
Whitewater property) development of orebodies found dur- 
ing the winter is being pushed, in readiness for ship- 
ment of ore as soon as the railway shall be available for 
its transportation. The Utiea, also, is awaiting similar 
facilities for sending its ore to the smelter. 



PORCUPINE 

Porcupine Mills at Work. — Sale of the Scottish On- 
tario. — Development Notes. 

At latest accounts the four mills at the Porcupine were 
all being satisfactorily operated, with, of course, occasional 
interruptions for adjustment of machinery. The manage- 
ment of the Dome continues to pursue its policy of reticence 
as to the results of milling operations, and the others 
have so recently got fairly under way that accurate figures 
as to the output are unavailable. Estimates give the daily 




prospecting at porcupine. 

tonnage of ore handled by the mills at 615 tons, and the 
aggregate value of bullion produced at from $40,000 to 
$50,000 per week. The Dome is shipping bullion at reg- 
ular intervals and its output is supposed to approximate 
$3000 per day. The Hollinger made its first shipment of 
a brick worth $5000 on July 6. It is only treating lower- 
grade ore until the mill is perfected. The Vipond is only 
working a little more than half capacity and has not so 
far made a clean-up. It has now 6000 tons of medium- 
grade ore on the dump, and stoping from the 200-ft. level 
to the 100-ft. level is in- progress. The Jupiter is in good 
ore at the 100, 200, and 300-ft. levels. On the second level 
four veins have been found, two of them having visible 
gold. The Hughes is in full operation again, having com- 
pleted its new compressor and steam plant. The shaft 
will now be sunk to the 200-ft. level and cross-cutting and 
driving undertaken at 150 and 200 ft. A new 6-drill com- 
pressor has been ordered for the McEneany, on which a 
vein 5 ft. wide at the 300-ft. level is yielding ore worth 
about $25 per ton. Negotiations for a sale of the Scot- 
tish Ontario to British capitalists are pending; engineers, 
who examined the property for the prospective buyers, 
having reported favorably. Peter McLaren, the engineer 
in charge, has gone to London in connection with the 
deal. The Mclntyre is in rich ore at 300-ft. level in No. 1 
and 4 shafts. The Plenaurum has cut a quartz stringer 
3 ft. wide, running at right angles to the main vein at 
the 200-ft. level. Free gold shows in a small streak. The 
Miller, Middleton, and Dixon-Gillies claims are being rap- 
idly proved. At the former there is a 125-ft. ore-shoot 
that will average $6 per ton. At the Dixon-Gillies three 
veins of high-grade character have been cut at depth. 



94 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



General Mining News 



ALASKA 

Cordova 

Shortage of labor at the Kennicott mines was reported 
recently. The new concentrator is running night and day, 
and shipments have begun. The crude ore is said to assay 
25% copper, while the concentrate contains 65% copper 
and 18 oz. silver. W. H. Seagrave, the manager, has also 
started men at work on the Jumbo. 

Fairbanks 

Additional information regarding the tin ore found near 
Hot Springs has been made public. Stream tin here at- 
tracted attention of Falcon Joslin, three years ago, and 
at his instigation a Mr. Robinson took up the search, which 
has now resulted in the discovery of an important tin- 
bearing lode crossing Sullivan, Tofty, and Idaho gulches. 
The average width of the lode is 12 ft., and the orebody 
has been traced by trenching 3700 ft. The dike with which 
it is associated has been followed 10,000 ft. The average 
value of the lode has not been determined, but the ore is 
obviously of workable grade. 

Seven stamp-mills are now in operation in this district 
and freight receipts on I lie railway have increased 34% 
over the corresponding month of 1911. Angus McDougafl 
is buying a 2-stamp Nissen mill to be placed on the Pio- 
neer claim. The Newsboy shaft is now 400 ft. deep and 
the grade of ore continues satisfactory. 

Nome 

The season opened with a rush, June 15, with the Sen- 
ator, Victoria, and Umatilla in port. The Edith and the 
Sheridan, the latter carrying troops, got caught in the ice 
and were delayed for some days. Twelve new dredges are 
reported as arrived or on the way, and of these four will 
be built by the Union Construction Co., one by the Yuba 
Construction Co.. two by .(. S. Kimball, two by American 
Construction Co., and one by the Union Iron Works. 

Seward 

(Special Correspondence.) — Conditions in the interior 
are unusually favorable, the season having opened several 
weeks earlier than usual. The Cold Bullion Mining Co., 
which is mining a high-grade gold-quartz vein on Craggy 
creek, a branch of Willow creek, and 35 miles from Knik, 
began milling June 1. The plant includes seven stamps 
and is in charge of W. E. Bartholf. 

Seward, June 5. 

The Kenai-Alaska G. Co. has ordered from the Tren- 
ton Iron Works an 3200-ft. tramway which is to be in 
operation about August 1. The Rotchford dredge of the 
Kenai Dredging Co. has been started and is reported to 
be working satisfactorily. Placer work is active on Stetson 
creek. Harper Bros, are now ready to pipe into the boxes. 
The ground was prospected last year. The Kenai M. & 
M. Co. has discarded the Ruble elevator and will also 
pipe direct into boxes. Hobson & Davis are hydraulieking 
on Bear creek and have already cleaned up $3500. Nutter 
& Dawson have 14 men at work on Cow creek and have 
been piping for several weeks. Nels Anderson and Nate 
White have completed a 500-ft. drainage adit on Lynx 
creek, and Adolph Young, who has been working alone 
on Gulch creek, while short of water, reports an average 
of $11 per day. Mike Connolly and J. A. Z. Turner are 
busy on Six Mile creek, and John Hirshep, on Palmer creek, 
is getting ready to mill the rich quartz discovered last fall. 

ARIZONA 

Gila County 

(Special Correspondence.) — At the Mc Morris mine in 
Richmond basin, ,S miles northeast of Globe, the 800-ft., 
2-compartment shaft has been retimbered to the 200-ft. 
level. The McMorris mine was a producer of rich silver 



ore in the early days of Globe, when only the highest grade 
ore could be shipped. The mine is being operated by the 
White Metal Development Co., of which the principal 
stockholders are H. B. Snell, R. B. Hegardt, W. D. Fisk, 
A. W. Crawford, George Wilson, and others. Mr. Wil- 
son is superintendent. Beautiful specimens of wire silver 
have been taken from the group of claims being worked 
by the Rice brothers and W. 1>. Fisk, S miles north of 
Globe. The ore occurs as a 2-i't. vein in diabase, and 
consists of native silver, hornsilver, and a mixture of cop- 
per and silver glanee. At Hie Iron Cap Copper Co. the 
general manager, F. A. Woodward, has been authorized 
lo proceed with development, and driving will be started 
west on the 800-ft. level of the Williams shaft. 
Qiobe, July 13. 

Moiiavk County 
At the Tom Heed mine the clean-up for the month yielded 
a bar worth $79,000. The electric hoist is now in operation 
and the mill capacity is being increased. The Hold Road 
is producing a $20,000 bar at each weekly clean-up. The 
new machinery for the addition to the mill is expected 
within two months, and the water supply is now sufficient 
for a 500-ton mill. W. 11. Hall is operating the Mocking 
Bird, in the Weaver district, aiul has developed a good 
quality of $15 to $S0 ore. The mill is expected to be in 
operation soon. 

Pinal County 
(Special Correspondence.) — The Lake Superior & Arizona 
.Mining & Smelting Co. has given an option on its prop- 
erty to the American Smelting & Refining Co. The hold- 
ings consist of 17 claims adjoining the claims of the 
.Magma Copper Co. at Superior, 30 miles west of Globe. 
The A. S. & R. Co. is given until October 20 to unwater 
and examine the mine, after which, should it so elect, it 
is given two years in which to develop the mine and make 
the payments. The purchasing company has the choice of 
making total payments of $100,000 cash and two-fifths of 
the authorized capital stock of the company which it shall 
organize to operate the mine, or, under an alternate plan, 
of $SOO,000 cash if it elects to purchase the property at 
the end of one year or $1,000,000 cash at the end of two 
years. F. W. Hoar, of (ilobe. represents Lake Superior & 
Arizona company, and J. Kruttschnitt, Jr., representing 
the A. S. & K. Co., has gone to Superior to make prepara- 
tions for unwatering the mine. The property is opened by 
an inclined shaft 1300 ft. deep and has about four miles 
of drifts. There is a considerable amount of oxidized ore 
exposed, averaging about 4% copper, and $50,000 worth 
of higher-grade ore was shipped from one stope, but it 
is upon the possibility of opening up sulphide ores at 
depth that the future of the mine depends. Sulphides were 
beginning to appear at the bottom of the shaft when the 
mine closed down, on account of lack of funds, three years 
ago. 

Florence, July 13. 

Negotiations are being made for the sale of the Mam- 
moth mine to the American Vanadium Co. The property 
was formerly a rich one, but has not been worked for 
over ten years. 

Santa Cruz County 

M. P. Freeman, of Tucson, has bonded the Black Dia- 
mond and Isabel properties, in the Santa Rita mountains, 
to Fred Challman, of Bisbee. Shipments of good ore 
carrying lead, silver, and copper are being made to El 
Paso. James Harrington, of Bisbee, has leased the prop- 
erty of John Allen and Ed. Castaneda, in the Sheedy dis- 
trict, and is shipping ore to El Paso. At the Elephant 
Head property an air-compressor has been installed, and 
work on a 1500-ft. adit will be started at once. The Bor- 
der Mines Co. has found good ore in the Austerlitz prop- 
erty and has a 3 -stamp mill at work on $5 to $20 ore, and 
is shipping two to three tons of concentrate, worth $80 
to $100 per ton, per day to El Paso. 

Yavapai County 

(Special Correspondence.) — The Swansea smelter will 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



95 



blow in in a few days, after some months of inactivity 
due to financial difficulties. About five carloads of ore 
per day will be shipped to Swansea from the Bluebell 
mine, and an equal amount shipped to the Humboldt smel- 
ter from the Swansea mines, as each needs the other's ore 
for fluxing purposes. The Yuma- Warrior Mining Co. has 
acquired the old Harqua Hala property and will imme- 
diately begin development. A. J. Pickerell reports that 
the adit on the Tillie-Karbuck group on Slate creek is in 
2000 ft. and has cut a number of good ore-shoots. The 
new machinery on the Commercial Mining Co.'s property 
in Copper basin is in place and will be ready to run in 
a few days. 

Prescott, July 13. 

Yuma County 
Work has started at the Horn mines, in the Turtle moun- 
tains, southeast of Parker, which were recently taken over 
by W. A. Clark. J. W. Fink, manager for the D. &. W. 
Mining Co., has recommended to the shareholders that 
a mill should be built. Five levels have b^en opened, to 
a deptli of 700 ft., and .'5500 ft. of underground work 
has been done. Rich ore has been found on the Fortuna 
group and development is in progress. It is reported that 
Frank Bowers has sold his potash claims, near Blythe Junc- 
tion, for a large sum. 

CALIFORNIA 

Calaveras County 

(Special Correspondence.) — A new shoot of quartz has 
been intersected by the prospect winze at the Cross mine. 
The find was made at an approximate depth of 1000 ft. 
Ore conditions are stated to be improving at 
the Gold Cliff. Both these properties are con- 
trolled by the Utica Mining Co. A winze, has 
been started at the Angels mine and will prob- 
ably be sunk to a depth of 200 ft. Fair-grade 
ore is reported. Development of the shoot re- 
cently found on the 900-ft. level of the Lightner 
is progressing steadily. The orebody is re- 
ported widening, with ore of milling grade. It 
is understood that the shaft will he sunk to a 
deptli of 2000 ft. before systematic stoping is 
commenced. The starting of the mill at the 
Smyth has been delayed by the burning out of 
a transformer. Free gold and sulphides are 
showing as the wide vein is opened. The North 
Star management is driving drifts to prospect 
the southern portion of the property. Un- 
watering of the Reiner gravel mine is progress- 
ing, and it is expected to clear the workings 
within ten days. Sinking will be resumed and 
drifts extended to the centre of the channel. 
San Francisco people are interested. Placer mining in 
the vicinity of San Andreas is active. Work has recently 
been resumed at the Reed, Chapman, and Cassinelli prop- 
erties, and plans are under way for reopening the Lloyd. 
A new shaft is being sunk at the Reed, and good gravel 
is said to be showing in the Chapman workings. It is 
rumored the Penn Mining Co. may experiment with a new 
process for smelter-smoke control at Campo Seco in addi- 
tion to continuing tests with the Thiogen process. The 
Calaveras Copper Co. is increasing the force of miners 
at its Copperopolis mines, and it is expected the smelter 
will be blown in before the end of August. The company 
reports a large tonnage of excellent grade ore developed. 
The deposits have been proved to a depth exceeding 600 feet. 
Angels Camp, July 13. 

Modoc County 

(Special Correspondence.) — A 2-ft. ore-shoot, assaying 
$18 to $125 per ton, is reported showing in the surface 
workings of the Gold Shore. The work is in charge of 
Fred Bell, formerly with the Goldfield Jumbo Mining Co. 
The Ft. Bidwell Con. Mines Co. has • overhauled its 10- 
stamp mill and made arrangements for Pierce amalgama- 
tors and Wilflev concentrators. It is understood that a 



cyanide plant is also planned. Sampling of the old work- 
ings is progressing, and plans include the sinking of the 
shaft to a vertical depth of 400 ft. About 30 miners will 
be employed before the end of July, according to present 
plans. This company has developed a fair reserve of mill- 
ing ore in the Mountain View and Sugar Pine claims and 
controls an extensive acreage. Detroit and Los Angeles 
people are interested. It is stated that $50,000 is available 
for preliminary operations. Four sets of lessees are pre- 
paring to start work on the Big Four. Several surface 
discoveries of promise have been made. Fitful falls of 
snow have somewhat interfered with work in the district, 
particularly on the northern slopes. 

Ft. Bidwell, July 12. 

Shasta County 

The Afterthought Copper Co. has purchased the Ander- 
son-Bella Vista railroad from the Terry Lumber Co. and 
is now completing a survey for the extension of the road 
to its smelter at Ingot. The new railroad company will 
be known as the California, Shasta & Eastern Railway Co., 
and location surveys are completed for the first six miles 
above Bella Vista. The surveyors are now making the nec- 
essary corrections and completing their surveys for (he 
upper six miles preparatory to accepting bids. At the 
mine the company has only a small force of men at work 
keeping the mine in repair and doing a small amount of 
development work. The construction of the road and a 
suitable reducfion plant for the recovery of zinc, copper, 
gold, and silver are most important at present, as there is 
enough ore already developed to last for several years with 
a 300 or 400-ton daily capacity. At the smelter three or 




PART OF SHASTA COUNTY. 

four men are at work developing a process for the recov- 
ery of metals. This has been developed beyond any doubt 
as to the advisability of adapting it to the treatment of 
the ores. As only two or three patents have been secured 
on this process, and several more are planned, it is kept 
private for the present. The company expects to install 
a 25 or 50-ton unit, in the near future, having tested the 
process out on only a 100-lb. capacity basis. 

Sierra County 

(Special Correspondence.) — W. M. Beggs and associates 
of San Jose have let a contract to the Union Iron Works 
for the immediate erection of a 5-stamp mill at the Kate 
Hardy mine, on Oregon creek. It is planned to commence 
crushing early in September. A concentrator and cyanide 
plant will also be installed, and electricity will be employed 
for motive power. Considerable development in the shape 
of adits and drifts has opened a good reserve of ore, ac- 
cording to statements of officials. The property lies in 
the Forest district. It is stated the Bank Mining & Pro- 
motion Co. has decided on the erection of a 5-stamp mill- 
ing plant at the Red Ledge mine, also near Forest. The 
head offices of the corporation are at Buffalo. Consider- 
able stock is held by Vancouver, British Columbia, people. 



96 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 



W. J. Moulton is superintendent. The mill at the Cleve- 
land, near Downieville, is being overhauled and arrange- 
ments made for production. The property is held under 
bond by Nevada people. Activities have recommenced at 
the City of Six quartz property, which is under bond to 
J. W. Henderson of Fresno. The Hewitt brothers have 
started a 5-stamp mill on their property near Gihsonville. 
The vein is reported about 20 ft. wide, with streaks of 
good milling quartz opened. 
Forest, July 13. 

COLORADO 

Clear Creek County 

(Special Correspondence.) — A streak of ore 5 in. wide 
has been uncovered on the La Plata vein on Democrat 
mountain that mills 281 oz. silver and 16% lead. Ship- 
ments have been started. Joseph Broad is the owner. The 
American Mines Syndicate, operating on Columbia moun- 
tain, is moving the Sigafoos boring machine from the 
Georgetown adit to its own property. It is stated that 
the Kelly adit mill will be brought into commission during 
the nexr two weeks. The machinery is being repaired and 
placed in condition to effect a higher saving than formerly. 
Ore will be treated from the New Boston mine on Demo- 
crat mountain. An average of 16 tons is being shipped 
daily from the Santiago mine in the East Argentine di< 
triet. D. H. Burlingame is manager. 

Georgetown, July !). 

Jefferson County 

At die Colorado School of Mines a new 14-ft. Littrow 
spectrograph lias been purchased, at a cost of $1500, through 
the Vinson Walsh research fund. This fund was given 
by the late Thomas F. Walsh for the determination and 
study of rare metals in ores. Because of its sensitiveness 
the spectrograph has been used to detect adulterations and 
many cases of poisoning. It has been used to a limited 
extent to study the tlames from steel and copper converters 
as a means of gauging the different stages in the process. 
There is still a large opportunity for investigation in this 
direction. Through the Vinson Walsh research fund this 
department has already been equipped with all the neces- 
sary apparatus to determine radioactive metals. With the 
new specially constructed spectrograph the school is in a 
position to cover fully the entire rare metal field. 
Lake County (Leadville) 

The tonnage produced at Leadville during June was 
about the same as preceding months, 60,000 tons. There 
was a slight decline in production by lessees on account 
of surface water. This trouble has now abated, and the 
out put should be larger during July. The dead-work at 
the Chrysolite. Fryer hill, is nearly completed, so that 
shipments of ore, which averages better than 30%, will be 
increased. Lessees on the south end of the Discovery are 
down to the 300-ft. level and have opened a pocket of 
high-grade 'lead sand.' Lessees in the Ella Beelar adit 
have found a good vein, 1800 ft. from the portal, which 
assays $40 to $50 per ton. The Anderson adit, on Prospect 
mountain, is now in over 500 ft. W. B. Anderson is man- 
ager. 

San Juan County 
The blacksmith shop of the Silver Lake caught fire re- 
cently, and before the fire could be extinguished the mine 
terminal of the tramway was destroyed, with a loss esti- 
mated at from $30,000 to $40,000. Shipments of ore dur- 
ing June were as follows: Sunnyside, 600 tons; Iowa-Tiger, 
175; Silver Lake, S25; Gold Tunnel, 175; Golden Eagle, 25; 
Pride of West, 25; Bonner, 25; S. E. & M. Co., 25; Gold 
King, 1250; a total of 3125 tons. 

IDAHO 

Blaine County 
The Independence M. Co. has obtained an injunction 
against the Wenatchee M. Co. to restrain the latter from 
interfering with the operation of the Independence mine 
and mill. At the Climax five men are now at work. 



Idaho County 

The clean-up at the Golden Scale placer has been com- 
pleted, 32.1*00 cubic yards of gravel having been moved. A 
race has been cut to the old channel, which was found to 
be higher on the hillside than was expected. Where found 
it is 30 ft. deep and the gravel all shows colors. The com- 
pany is now in shape to begin operation next spring with- 
out any dead work being necessary. Work on the 7-mile 
ditch, to take water from the East fork of the American 
river, is well under way. 

Shoshone County 

Earnings of the Federal M. & S. Co. for the first 9 
months of the fiscal year are $633,700. Dividends are now 
being paid at the rate of 6%. The company is producing 
about 4000 tons of lead per month. The Tamarack & 
Custer Consolidated M. Co. has been formed to take over 
the Tamarack & Chesapeak and the Custer mining com- 
panies. The capital is $2,000,000 and 25,000 shares will be 
placed on the* market. Both properties will be worked 
through the Tamarack adit. The lower adit at the Lucky 
Calumet has cut the vein and it is reported that the man- 
agement will at once proceed with the construction of a 
100-ton mill, to be later increased to 500 tons by 100-ton 
additions. The Bullion M. Co. expects to start shipping 
soon. J. H. TaVlor is manager. The Alice mine has shut 
down. Work has been resumed at the Surprise. Otto 
Xordquist is superintendent. 

MONTANA 

Madison County 
The Copperville group of quartz claims on Peterson 
creek have been sold by E. C. Hosmer for $50,000 to H. 
A. Bowman, who represents Butte interests. The ore as- 
says 8 to 17% copper and as high as 800 oz. silver per 
ton. A mill will probably l>e erected as soon as sufficient 
ore has been blocked out. A road is being constructed 
from the railway 8 miles up Ramshorn gulch to the Bed- 
ford mine. The Walters Tunnel Co., which is developing 
the Bedford, will build ore-bins at the railway and a saw- 
mill at the mine. Large quantities of lead-silver ore are 
said to be blocked out in the property. W. Walker and 
M. Johnson are working the Betsy Baker and Gold Coin 
and have developed large amounts of gold ore of milling 
grade. 

Silveruow County 

(Special Correspondence.) — An option on the Macarona. 
Montgomery. Altona. the Colleen Bawn, the Amazon, and 
the Park City claims, situated southeast of the city, has 
been given lo A. B. Wolvin. president of the Butte & 
Superior company, for the sum of $170,000. The claims 
belong to what is known as the Brundy estate, and in 
order that the agreement might be made, permission had 
to be secured from the District Court. With the delivery 
of the option agreement, Mr. Wolvin paid $1000, and is 
to pay $4000 in ninety days, $5000 in six months, $75,000 
in one year, and the balance. $90,000, in eighteen months. 
The Brundy properties have undergone some development 
work, but have never shown any rich ore, so far as can 
be ascertained. Some years ago, when the claims were 
under option to New York capitalists, J. Parke Channing 
spent considerable time making an examination of the 
property, but what his opinion of the claims was, never 
could be ascertained. However, some time afterward the 
New York capitalists withdrew from operating the prop- 
erty and the option went by default, it having been stated 
that a controversy arose which could not be adjusted. It 
is understood that the Guggenheim interests are back of 
Mr. Wolvin in the matter of this option, but this is only 
surmised. 

Butte, July 13. 

It is reported that the Tuolumne will not declare any 
dividend in August'. The company is shipping 200 tons 
per day, chiefly from the 1600 and 1800- ft. levels. The 
Snowball vein in the North Butte has been found to be 



July 20, 1912 



MINING AND SCIENTIFIC PRESS 



97 



richer on the 2400-ft. level than on the 2200, the vein 
being 7 ft. wide and carrying 10% copper. 

NEVADA 

Lyon County 
The Mason Valley smelter made a record run on July 6, 
smelting 817 tons in 24 hours, in its 400-ton furnace. The 
ore received at the smelter during the week ended July 4 
was as follows: From the Nevada-Douglas Copper Co.'s 
mine at Ludwig, 2580 tons; from the Mason Valley Mines 
Co.'s mine at Mason, 2249 tons; from miscellaneous mines, 
734 tons. Shipments of copper matte from Thompson for 
the same period amounted to 10 carloads. The Yerington 
Copper has resumed shipments. A new compressor is 
to be installed soon. The drift on the Malachite has almost 
reached the orebody. A 2-conrpartment shaft is being sunk 
on the McConnell property and has reached a depth of 
30 ft. in ore averaging 6% copper. The Yerington Moun- 
tain Copper Co. will begin ore shipment in the near future. 
Nye County 

The new main shaft at the Tonopah Extension has reached 
a depth of 350 ft. The east drift from the 501 stope has a 
full face of $30 ore and development work elsewhere in t he 
mine has added greatly to the known ore reserve. At the 




Montana Tonopah 888 tons of ore was milled last week, 
with a 94% recovery. The clean-up for June yielded 
390iy 2 lb. of bullion," valued at $45,840 and 34.7 tons of 
concentrate from 4045 tons of ore. The clean-up at the 
MacNamara for the 15 days preceding July 9, yielded 886 lb. 
of bullion, valued at $10,450. The mill is now treating (i7 
tons per day. The Golden Anchor shaft of the Tonopah 
merger has reached a depth of 985 ft., and a station is 
being cut from a drift which will be driven to the vein. 
White Pine County 
The coroner's jury has returned a verdict of death by 
accidental explosion in the case of the ten men killed by 
the explosion of the three boxes of 40% dynamite at the 
Copper Flat pit of the Nevada Con. on July 7. The men 
were loading a hole in the ordinary way when the powder 
on the surface exploded, and all were instantly killed. The 
powder in the hole, and in a nearby one which had already 
been loaded did not explode. No reason can be assigned 
tor the explosion. High-grade ore has been found on the 
Morris No. 1 claim of the Giroux Con. Ore from the Taylor 
dump is being shipped to the smelter. Development is pro- 
gressing at the Coppermines Co., and arrangements are 
being made for the installation of a gasoline hoist. Good 
results are reported from the drilling on the 1245-ft. level 
of the Boston Ely. Recent development work shows the 
Emma vein to be 72 ft. wide. The adit of the Smokey 
Development Co. is in 100 ft., and has a like distance to go 
before reaching the orebodies disclosed by drilling. The 
Lead King has several carloads of ore ready to ship, which 
is reported to contain 80% lead. 

NEW MEXICO 

Grant County 
The Silver King mine, in the Central mining district, has 
been leased to J. T. Jones and B. P. Keel. The vein is 



reported to be 5 ft. wide at a depth of 25 ft. and to assay 
$0.10 gold, 2 oz. silver, and 30% lead. 

OREGON 

Josephine County 
It is reported that the funds have been secured for the 
construction of a railroad from Gi'ants Pass 52 miles up 
the Applegate river to the mines of the Blue Ledge dis- 
trict. E. M. Chester is the representative of the interests 
concerned. The Soule mine has been purchased by J. D. 
Densmore, H. McBride, and D. G. Dreger, of Salem. 
Arrangements are being made for the reopening of the prop- 
erty, which has not been worked in five years. The mining 
men of the district have sent 3^2 tons of ore samples to the 
Mining Congress, held at Yreka this week. L. E. Crouch 
has begun suit for $100,000 damages against several Ohio 
people for alleged misrepresentation as to the solvency of 
the Almeda M. Co. The court has discharged the receiver, 
R. S. Tucker, who was recently appointed. The Alton mine, 
near Wolf Creek, has let a contract for a 100-ft. extension 
of the present adit. 

UTAH 

The following Utah companies have declared dividends 
during the first six months of the year: 



Bingham-New Haven $ 45,724 

Cliff 30,000 

Colorado 60,000 

Daly-Judge 45,000 

Daly West 135,000 

Iron Blossom 170,000 

Opohongo 17,978 

United States common 351,010 

United States preferred 850,576 

Utah Consolidated 150,000 

Utah Copper 3,750,000 



Total ' $5,605,288 



Summit County 
The Ontario mill is well advanced, and it is hoped to 
have the reconstructed mill in operation. The mine is ready 
for the increased output, and the old stope fillings are al- 
ready being hoisted to the surface. At the New York 
Bonanza two shipments of ore have been made, and a third 
is ready: a total of 90 tons, which yields a net return of 
$10 to $12 per ton. M. J. McGill is manager. In the 
Ontario adit three shifts are at work cutting a station on 
the 2100-ft. level of the Daly West, and as soon as it is 
completed stoping will begin. Shipments have been as 
follows: Silver King, 593 tons; Daly-Judge, 451; Daly 
West, 198; Sam Hair, 9 tons. 

CANADA 

British Columbia 

It is stated that a new company will be formed to take 
over the Red Cliff Mining Co. and to acquire a controlling 
interest in the Tyee Copper Co. It is reported that M. K. 
Rodgers is negotiating for the Big Missouri group of 16 
claims, owned by Dan Lindeberg. The Granby Con. has 
bonded the Doyle group, on Observation Inlet, for the al- 
leged sum of $100,000. During the summer $20,000 will 
be spent on development. Work has begun on the 2000-ton 
smelting plant. Shipments of blister copper from the 
Granby for the first week of July amounted to 435,000 lb. 
N. McLeod Curran, who recently purchased the Northern 
Terminus, is developing the property. Rich gold ore has 
been found 18 miles from Stewart on ground belonging 
to Dan Lindeberg. The Nickel Plate has two diamond-drills 
at work and extensive development is being carried on. 

The fourth dividend of the Standard Silver-Lead M. Co. 
in the Slocan district has been declared and amounts to 
$50,000. The total to date, according to the Spokesman- 
Review, is $175,000, giving the property the best record 
of any mine in the Northwest. The mine has been in oper- 
ation twenty months and has expended $150,000 for ma- 
chinery. 



98 



MINING AND SCIENTIFIC PRESS 



July 20, 1912 • 



Ontario 

(Special Correspondence.) — At the Nipissing hydraulic-k- 
ing operations have exposed an extension of vein No. 92, 
carrying from 1 to 2 in. of high-grade ore, and two other 
veins. The output of ore for June was valued at approxi- 
mately $22."), 1 Ii2. The high-grade mill during that month 
treated 181 tons of ore and the bullion shipments were 
820,278 oz. of a value of $198,824. The principal ore pro- 
duction was from vein No. 73. A 1-in. stringer has been 
found running at right angles to this vein on the second 
level, which assays 1500 oz. per ton. At the Provincial 
a deej) bed of conglomerate has been found underlying the 
slate at the 3-30-ft. level. So far the best veins of this mine 
have been found to occur in the conglomerate, and the shaft 
will be sunk farther in the hope of finding other deposits. 
The Crown Reserve has declared its regular quarterly divi- 
dend of 2% and a monthly bonus of 3%, making total re- 
turns to shareholders of 250% of the capitalization. The 
Dominion Reduction Co. has been organized, with D. N. 
Steindler as president and Eugene Steindler as secretary- 
treasurer, to take over and operate the Nova Scotia mill, 
which is being altered so as to secure increased concentra- 
tion for the treatment of the conglomerate ores. The 
Gould Consolidated, which holds a lease of 120 acres from 
the Peterson Lake, has made an agreement with the Porcu- 
pine Syndicate, Ltd., under which the latter will operate 
the mine. The Porcupine Syndicate will continue devel- 
opment at the 100-ft. level, where several veins have been 
found which are apparently extensions of Nipissing de- 
posits, and will sink to a lower level. The Cobalt Majestic 
Co., which is in liquidation, is paying its creditors in full, 
and the shareholders may also receive a dividend, as some 
of its claims are likely to bring good prices. Good progress 
is being made in the construction of the Elk Lake branch 
of the Temiskaming & Northern Ontario railway on which 
400 men are working. Eleven miles of grading has been 
completed and the rails will be laid as soon as the steel can 
be secured. The line is expected to be completed by the 
end of the year. 

Cobalt, July 10. 

MEXICO 

SONORA 

(Special Correspondence.) — The Tigre Mining Co., S. 

A., reports the returns for June as follows: 

Estimated realizable value of: 

Bullion produced $04,877 

Concentrate produced (244 tons).... 57,932 
Shipping ore produced (110 tons).... 27,010 

$149,S19 

Sundry profits 3,517 

$153,330 

Less : 

Mining, including development $20,409 

Milling 33,468 

General expense 3,139 

Marketing 28,517 

85,593 



$ 67.743 

Kansas City expenses, including interest on 
bonds 3,146 



Estimated profit $ 64,597 

The mills crushed 5676 tons of dry ore during the month, 
and the cyanide plant treated 5439 tons of tailing from 
the two mills, and 20S1 tons from the old tailing dumps, 
an average of slightly over 250 tons per day. A total of 
267 ft. of development work was done during the month. 
To obtain the exact amount, realized during the month, com- 
plete smelter and refinery returns would have to be obtained, 
involving a delay of two months. Experience in the past 
has been that the returns from the mine are within 1% 
of the final returns. 
Yzabal, July 5. 



James Lewis & Son's Copper Report 

A further advance in the price of standard copper of 
£3 per ton has taken place during the first half of June — 
from £76 2s. 6d. to £79 2s. 6d. for cash. Up to £79 2s. 6d. 
was paid on June 6, from which there was a recession to 
£77 15s. Od. on June 14, due to extensive liquidation to 
secure profits. This fall was recovered June 17, the clos- 
ing prices being £79 2s. 6d. cash and £79 15s. Od. three 
months. Sales amounted to about 40,000 tons. The statis- 
tical position continues very strong, and consumers are 
threatened with a serious scarcity of refined copper, aggra- 
vated by a continuance of the strikes at two of the largest 
American refining works and the rapid diminution of the 
stocks held on this side of the Atlantic as well as of those 
hold by American refiners. Electrolytic copper has been 
sold freely up to £80 15s. Od. per ton c.i.f., and from 
warehouse here, American producers being fully sold for 
delivery up to September. 

Statistics show an increased import into Europe from 
the United States of 21,702 tons, Tmt from other countries 
a decrease of 13,448 tons. The consumption of Europe 
is 19,080 tons larger than during the same period last 
year, but the exports have fallen off 5387 tons. The fact 
that the consumption of England is 7482 tons less shows 
the reduced stocks held by English manufacturers, in view 
of the general admission that both the copper and steel 
trades have been and a